This really depends on the instructor, which is why a few posts above I mentioned that
If the instructor/DM trainer is a good one, you can learn a lot. But if the count of your dives is correct, you will likely be not able to evaluate how good is the IT - simply because you don't know what you don't know.
Honestly, given what you discussed here, and your interest in living the lifestyle - just go for it.
Then back in the UK, you will find many cool paths, tech or rec, so you'll find what's for you.
Honestly, at this point, the only thing I would worry about if I were you is to evaluate whether the diving centers you want to go with are good or not. But this is an entirely different discussion.
PS Yes, diving insurance. DAN or something similar - really needed.