Do you know any tech divers?
I got lucky and had an instructor to mentor me about tech diving, giving me some insight on how it all goes together and letting me decide for myself what I liked best. He let me borrow reading material as well as videos on gear configuration. I read the fundies book and practiced many of the skills that make you a proficient tech diver. Your learning will go much quicker and you will get more enjoyment if there's someone there to help you when you struggle with something. He's been an invaluable resource to me and many others.
Your buoyancy must be spot on, no exceptions. Task loading will tell the tale if it's not mastered.
Your mindset has to change, my regular dive buddy has been struggling with this one. Self sufficiency is of the utmost importance, you should be prepared to handle any emergency under water and never consider a buoyant ascent as a way to extricate yourself from a bad situation. When the defecation meets the oscillation you should be trained up to the point that solving the problem is second nature to you.
No piece of equipment should take the place of good technique. Learn the skills, master them, regularly practice them.
As far as I'm concerned, there's no magical number of dives that will ensure you are prepared for a tech class. I started diving doubles with about 50 or so dives, started a tech class just after that and did well with the transition to doubles. I know my regular buddy did a cavern class with about 20 dives and did well enough to learn what was needed to keep going in cave/tech classes. It's totally dependent upon your personal comfort and skill level. I've seen divers with 10 times more dives than me that wouldn't have a chance passing an adv. nitrox/deco class.
Having people you trust give you advice will help a great deal. No chat board will be able to take the place of practice and/or a competent instructor. Don't just learn how to do your skills, learn why you need to know how to do them.
Become an ambassador of tech diving to your OW classes. I usually bring my tech gear to the quarry and dive it after class is over, the students generally get really excited about new things, this is a great way to educate the rec crowd.
Good luck, and pm me if you have a specific question about my journey.
Jason