I pretty much agree with your disposition towards life.. I really hate taking any thing too seriously, and a theory I have is that when you start taking life too seriously is when you start suffering.. Some people get too attached to their lives and then when they start suffering too much, they are too attached to their life to ever suicide, so they just end up suffering through the pain..
I believe every person should have the right to euthanasia if it is determined that it is really what they want and not just a spur-of-the-moment idea.. Fortunately though, no matter what type of laws are enacted against suicide, if some one really desires it strongly enough they can usually find a way..
And about your dad....or more accurately, any one you leave behind: I don't think any one should have to live for other people.. I mean would you want some one to tell you "Hey I really want to die, but I haven't killed my self yet because it might hurt you too much"?.. We can try to mitigate other people's pain from suicide a tiny bit (maybe by things you put in your suicide note, etc), but in the end we really have no choice but to leave them to their own devices and let them deal with it how ever they will.. We don't want them to have to go through some thing like that, but like I said, we can't live solely for the sake of other people..
When I was a teenager, I actually never wanted to live past age 30.. I just never liked the idea of getting old, and I always sort of had a vague idea that I would probably end up suiciding later in life after I reached age 30+..
Well....I was fairly happy most of my life.....but then some thing devestating happened to me at age 30; I had listened to headphones too loudly for too many years and I caused my self hearing damage, but worst of all I got tinnitus and hyperacusis (being really sensitive to sound, it hurts my ears, even normal medium-volume sounds)..
It threw me down in to a ridiculously deep depression....I couldn't even function or do any thing....I was super depressed for several years, and I found out I was too attached to my life because I was willing to suffer through all of that depression instead of killing my self like I should have.. (I was suffering from the tinnitus sounds by the way.. It drives you ABSOLUTELY CRAZY.. And also from the hyperacusis, so I always have to protect my ears)..
Eventually I guess my mentalness got so sick of suffering that it made me stop caring about my life any more, as a mechanism to stop the deep pain from being depressed... So now I don't even care about my life any more...I am not attached to my life very much at all any more, and I really don't care if I die any more..
I am now 37 and even though I'm not super depressed any more, I have never been able to get back near the levels of happiness I felt before age 30.. I am tentatively planning on catching the train to hell either around winter of this year (2019 december) or winter of next year (2020 december).. The reason I might wait until next year is kind of silly; I actually enjoy playing switch games like mario and xenoblade2 and other stuff, and I do have some online friends I talk to on riot (riot is like an open-source version of discord), and so I wanted some more time to play games and talk to those people.. Also would give me a chance to vote once more in the presidential election.. So we might end up leaving at the same time (unless I extend my life again, which I have a bad habit of doing).. And the reason I chose december is because I like choosing astrological dates like the vernal equinox, summer solstice, autumnal equinox, and winter solstice..
I know I've already written tons, but I'm always overly verbose so whatever...deal with it..

But I wanted to say that, I think different people have different levels of standards they have for their life.. Some people can lose both their legs, be in a wheelchair, be homeless, and have cancer, and they will still try to keep on struggling through life and living some how with out even thinking about suicide.. Other people might choose suicide just because they don't feel quite as happy with life as they used to, even though nothing in particular is going that bad in their life..
Each person sets their own standard they have for life, and I believe that it is no place for other people to dictate where an other person's standard should be set at.. The homeless crippled man might yell at some one else suiciding over merely losing one of their favorite cars in a wreck, but that is still their prerogative and their choice, not the homeless guy's.. Nobody should be forced to lower their standards of living way way down just because you can find some one else some where in the world that is able to struggle through such a level of pain with out suiciding yet..
One more thing: The method I will be using is probably the helium tank (also known as exit bag i think).. Jumping is going to be scary as hell, and you might have a heart-attack from fear even before you hit the ground.. If you can get N that every one talks about I suppose that would be easier than helium, but for me, I just don't want to have to deal with trying to find it, and then worrying about it being delivered successfully with out being flagged etc.. But that's just me, but wanted to just tell you that you might look in to helium, but definitely wouldn't want to jump if it were me..
Love and light