I agree, you should only do it if it something YOU want to do. If you go into it for the wrong reasons, you may end up resenting it, or feeling like a failure.
I was vegetarian for a long time (few years) before even considering seriously making the switch over to vegan. And I'm still not *there*~ Nor do I ever know if I WILL get *there* (wherever *there* is, lol)
All I can do is what I feel is right, and do what I can. Some days are easier than others. This afternoon was a bad one and I caved at lunch. I actually feel really gross right now, after eating that. Wish I'd sucked it up and just made myself something after all. (Anyway!)
So do it because YOU want to. And the other reasons are good, but if YOU don't think that way, or have those beliefs personally, it won't make much of a difference.
Keep researching, and we are here if you have questions!