I will always point people at a basic Tech course - in the PADI world called Tech 40. Before you switch off - I think its an invaluable course, I wish it was a pre requisite before people could progress to DM or Instructor.
Even if you have no intention of making Deco dive (Tech 40 max 40m and 10mins deco) you'll learn lots of additional knowledge and get skills improvement / refinement (with a good instructor) which are absolutely applicable to recreational diving.
Exactly. I was just going to say the same thing.
Technical training at its core really isn't about gear or going into deco. It's about building a mindset of approaching every dive with formal planning. Thinking about your gas consumption on each leg. Thinking about what nitrogen loading really means, and how it affects you even on dives within NDL.
And who knows? You might like it enough to start doing longer dives with staged decompression. Tech doesn't necessarily mean deep, and it doesn't necessarily mean very long deco hangs. I did my tech training because I wanted to spend more time at moderate depths. There are plenty of tech divers who just dive to look at the pretty fishes.
This is one of the reasons why I am so unimpressed with the "Master Diver" rating. It implies someone who has enough time, money and love of diving to put in a lot of work with training, and yet doesn't do the next logical step in diver progression because of misconceptions about "technical diving".
Rather than following the seemingly endless path of doing all of those recreational specialties, do something that will give you a new platform for your diving. If you don't want to stay with PADI, there are good basic intro to tech courses or basic technical diving courses in other agencies.