Normally the way this sort of thing transpires is a customer notes what project or file they are having difficulty with, sends in a file, or a sketch, and we work up a step-by-step custom tutorial to accomplish what they are having difficulty with.
For example:
which has been updated slightly at:
As @jepho noted, the best way to approach this is to start with an exceedingly simple task, and work though it from beginning to end, learning from the successes, and working out the difficulties encountered systematically, with the simplicity of the task making the difficulties simple to identify and to resolve.
Where would you like to start? What basic thing would you like to try to do which you are having difficulty with?
We can’t help if you don’t ask for help in a fashion compatible w/ what it is practicable for us to provide.