I've done a lot of research and practice with pua. I feel like I really would get better if I had something like a coach to analyze my game specifically, but I have yet to spend money on pua. Is it really worth it to spend $ on a workshop and/or instruction or could I still reach the level I want without spending? (kiss closing, sex, relationships)

What have your experiences been with this?

No. It's not worth the money. I saw some RSD "lecture" videos on youtube, and I wouldn't count on those guys to teach me to microwave popcorn. A crew of aspies.
Go out, MAKE FRIENDS.
Lots of friends. GUYS. And no, not guys in your WoW guild or train collectors club. Normal/interesting dudes without social impediments. Get out and do stuff together, meet people, become more social. Then start working on the girls. I guarantee you'll get better results. Just going for the girls when you're a socially awkward weirdo, will not work. First you get the friends, then you get the social skills, then you meet girls (often through friends), and then you get the girls.
And remember, the biggest tool in PUA is an abundance mentality. It can only be created truly, by the creation of said abundance. Always keep options.