Primer

Ron816 said
I was planning on using a high build urethane primer, so should I seal after that? Or can I apply base over the high build?

I am sorry for saying this, but it still sounds like you are trying to cut corners. You ALWAYS should spray a sealer before applying color. Several people have suggested using sealer. Ignore that at your own peril.

Ron816 said
I realizing that everyone has there own opinion, for me what it comes down to is, just wing it, what’s the worst that can happen it looks like ****, I can always sand down and start over, that’s what learning is all about try and try again until you succeed, it’s only paint and time right

Although I agree to a small extent that your "If it doesn't look good I'll start over, after all I am just learning" attitude does have some merit, I strongly disagree with it's only paint and time. Paint, clear and primer are all expensive. Why not spend just a little more time and do it right. I really do like that you are trying the painting yourself. You cannot cut corners on a paint job and have it look good.