Try mapping something known to be real simple. Maybe some 5ft per square old school dungeon style. Do it in black and white. Pick a few techniques and get good at them before going more complex. You don't need to use every function of all the apps you have. Try to use the functions you know from the photos. Drawing with a mouse and without a tablet is hard. I don't do it. I like to draw on paper, scan in and then touch up with computer or not draw at all and make maps from patterns or tokens.

A lot of the work I do in my day job has oodles of people wanting to sell courses for lots of money and I have been on a few but in almost every case it was no substitute for just doing it yourself, accepting that its going to be hard and painful at the start, you get totally lost then after a while the mist parts and light shines in. Same for everyone who succeeds. There are people who make it look easy but nobody is born a virtuoso.