If you are looking tuition to learn yo use and care for your own equipment, contact them and tell them that.
The problem is that on any course you will get general pointers about equipment and paint, but unless you could specify exactly what your intentions are in the long run, they can't offer you much more.
I think you should save your money and just try to get to know both your brushes and learn what they both can do, experiment with thinning and pressures as already discussed and don't be afraid to try other paints.
130 quid is probably based on a class of between 6 - 12 students, a course tailored to your specific needs would more than likely cost a lot more so be sure about this before you decide on anything.
I can understand if you think it's going a little slow for you or you feel that you are getting nowhere fast, but a little patience and determination as well as regular practice will pay off, how soon it does is upto you.
Set yourself a a practice schedule of an hour every day or less even, and outside of that try to enjoy messing with little paintings or doodling with your brush, it's all relevant.
Most proper courses would assume that you have some basic experience and or knowledge of your gear.
As you know I have been given loads of info and suggestions of what to try, how to do it etc etc.
I'm just frustrating myself trying different things, pressure ,distance ,trigger control, paint reduction etc etc.
I fooled my self into buying a cm-b,but I trully glad I have as I think I have better trigger control,also buying a better inline Mac valve gave me better control of my pressures as well.
This is was proved tonight,once again your suggestion to switch to opaque,this proved I had better control as I could pull light intencity, and do narrow lines to reasonable fades( well I think so).
Tip dry, now I know what that is, something never encountered before. I'm starting to think the paint might be the prob as the age etc not known, so was thinking poss change to etac, but is that just another excuse.
I do practice 1hr a night if not more and I'll prob get 3-4 each day this weekend.
Am I expecting to be further along, definitely yes, what do I want out of it, fine illustration is mine one goal,am I trying to go to quick to small in a short time,probably.
This is the same with anything I do,I expect to have the best I can afford,the knowledge to achieve my aims,theoretical, and the determination to get the practical side the best i can.
My biggest challenge I have ever set myself was to breed and raise wild clown fish( nemo) but different species.this I achieved in 2yrs,dedication yes, reading everything I could yes,failures yes but I got there in the end.
This is no different but I just thought that a class might get me over that hurdle I keep falling at, your right that no one can teach you better than experience.