We need to know where you're going to advise you on how to get there.
1.) Where have you dove in the past?
Red Sea and the Mediterranean Sea. 70% of my dives are up to 30 feet
2.) What do you see as bothersome or inadequate in your current level of ability?
Mostly? my Air consumption. I use ~ 20L of air per minute. I really get along with my 12L steel tank on most of my dives and with most of my current buddies.....but there are some divers at my group? that uses 11 - 14L ....
and I don't have a clue how to get there
( I've been trying all the common advises like split fins or being calm etc. doesn't help....like another dimension of breathing )
Also, most of my buddies say my movements, buoyancy control and trim are GR8. But I'm looking for the next level....?
for example, one very trained diver advise me to dive with my hands, beside my body ....like tied up. and to think buoyancy "without my hands"
to think buoyancy with my mind / breathing,and not to be afraid to "crash" ...until I will catch the principle.
It was hard doing that....but after 2-3 dives? I was there....
So when I put my hands back in front of me? it was like a big bonus.....
This is the kind of hard / next level trainings I'm looking for
3.) What places do you want to go, and what kind of diving do you want to do, that you believe your current level of ability is dissatisfactory for?
I want to start diving with a group of photography divers. 100 feet sites at the Red Sea.
They all have a much better air consumption....I will not fit there
Examples of goals that aren't obvious from your post. Do you want to do...
1.) Penetration dives - such as wreck?
no
2.) Cave diving - with the concerns of the above, and a need for great buoyancy and non-silting kicks?
no
3.) Deco. diving? Interested in Tri-mix?
no
4.) Get great buoyancy control and trim, drive down SAC and get lengthier bottom time on a tank?
yes yes : ) exactly my goal
5.) Dive more adverse conditions - such as ice diving?
no
GUE Fundamentals is often advised for people looking to improve generally. A forum Search for that might show you something you can gain from, if you can find a good instructor for it in your region (I have no idea about that).
OK GR8 Idea I wasn't aware about GUE
A Personal Trainer, was one of my options....couldn't find the right one yet.
and the costs... are a bit heavy for me right now
Richard.