1) Always use STOCK cars, never use cars that have custom suspension or custom parts on.
2) Always use the EXACT same car, but vary the tracks.
3) use car / tyre combo that doesn't have too little or too much grip, try:
FT86 - Sports Hard
BMW M3 '07 - Sports Medium
They were my training cars a year ago, but with the new physics you might want to go down a tyre on each.
4) Choose 3 or 4 tracks you like, or know well but have some kind of challenge to them. Spa and Cape Ring periphery were a couple of mine.
5) Don't listen to other people's timescale about getting up to speed and being faster with wheel than pad. Some people take days, some weeks, some months and some never get faster or better. It's an individual thing with different factors involved.
6) Turn off all driving aids - everything. ABS 1 is "OK", skid recovery and traction control must be turned off.
7) Don't use too much force feedback - go for medium setting, 5/10. You can always increase/decrease or fine tune once you are up to speed.
8) Practice over and over and over again, BE PATIENT, don't try and run before you can walk, don't listen to other's bul**** timescales or claims - concentate on yourself and your progress.
9) It's not just the steering to get used to, it's throttle and brake control too. Not just individually, but together too - having a little throttle applied when braking can help stabilise car when lifting off to 'turn in'.
10) Don't just use a clear track TT, use the seasonal events to practice overtakes etc.
There's much to learn and practise - try making slow and steady progress. Don't compare yourself to others.