I feel like "self" doesn't have a good definition and every issue of self-identity arises from this.
Not sure whether it's even worth it to worry about this.
Agreed. That's why I personally believe that disbelieving in the notion of a "self" can help partially resolve panics of "what it is".
And I am aware that your statement of "whether it's worth it" may have been you just partially venting, but I want to highlight that it
is a genuinely good question.
Is this worth worrying about? To me, that seems like a good reason to question the merits of this idea, so we can allow ourselves to forget about it.
If I may be brash; I may even draw a similar parallel with the idea of a God. If a person seriously considers the base reasons for why anyone may believe in a God or similar being, and at the end of it declare that such reasons are insufficient--and as a result posit the absence of a God or declare it cannot be proven--then they relieve themselves of having to worry whether such a being exists. They solve a problem that the theist has to deal with; the uncertainty of an important belief they have.
That's just a utilitarian reason for disbelieving in the notion of a self, so we don't have to worry what it actually is. I find this helped by the evidence against it, such as other reasons I might add. It also removes the idea of there being a "true" self to blame yourself for, and allows you to dissociate from thoughts of yours you dislike, to a degree. But those are just some of my own reasons and opinions.
As for
every notion of self identity--I'm sure it's likely a significant amount of self-identity issues arise from confusion from "what a self is", but I would have to think more on whether
all issues of it arise from this idea. It seems more safe to say "large portion" than "all", in most cases with most ideas, though.
I don't have much of an identity and it's possible to live like that, just a bit inconvenient.
Me being here might hint that it's not very good in the long run, thought.
Perhaps if dissociating from the idea of an "identity" removes some amount of discomfort or guilt, then it is a good idea, if it relieves and provides ease to one's life.
And I just want to add, you being here doesn't necessarily mean "
all your ideas are wrong"; maybe you're right, but it's just that some other issue in your life caught you up and hence, had you here. I wish us both luck in the long run, though.