Don't you dare retire!
For one, you are not old enough.

Seriously, if you want to build models of any description, then build them. If it is something that give you pleasure, then do it. If it feels right, do it.

I had a 'rubbish' time at school too. Didn't fit in then, still don't & I'm 53!. It's not easy.
Don't worry about what others think about you. it's what YOU think about you that matters.
It takes skill to build a model. Whether it's a kit or from scratch doesn't matter. You could go on to build models professionally for museums or for the film industry.
I am a single father who brought his children up with the belief that they can do anything they want. You can too.
The *expletive* at school are bullies. Go see the head about it. Don't suffer in silence like I did.
I look forward to see your posts in the future, dude. I shall be checking too.

Regards Al