From this single post alone I read a huge lack of confidence. This will probably sound harsh, but I find it really important, and it's something that took me way too long to understand.
ive never made a thread on here before so if i do it wrong, im sorry...
By preemptively apologizing you're devaluing yourself and the worth of your apologies.
You've been around for nearly a year. The rules are simple, and you've seen what posts others make. You know whether your post is ok or not, with very high certainty.
When apologizing you're essentially designating yourself as a scapegoat. To me "sorry" means that I deserve and expect to be blamed, and from my experience that's also how it's received.
My advice is to reserve apologies for situation where you caused harm, due to negligence or ignorance - where you clearly could and should have done better.
If this post receives a complaint your preemptive apology is useless. If you've done what you think can be expected of you, to make an acceptable post, the apology is also misguided.
Instead, give a brief explanation to help others understand where the mistake originated. Then see what you can do to correct the problem.
In time this approach/mentality will make you more comfortable dealing with mistakes, and you will seem and eventually also become more reliable and trustworthy.
It didn't come naturally to me, and you might have to force that change. It's highly recommended, though.
how can i stop being like this,,?
Lack of confidence is what permeated your post, but don't hesitate to start threads about more specific problems. People are generally happy to share their different perspectives.