Welcome, and congratulations on your first steps! I have 2 tips:

The videos linked by @Don Anderson Jr. are great. I was stumped at making anything good until @Ralf told me to watch these videos. It made a huge difference for me. I normally don't use tutorial videos, but these are really good.

This forum is the best tool to continue after the videos. The people here are friendly, helpful, and sometimes even knowledgeable. 😛

Good luck!

This is outstanding! I love that work, and it's great to hear that you're doing this.

I think the latest CA turned out to be really cool! This is going to be useful for some of my own games.

(I'm probably biased. I'm a programmer, so art like this amazes me.)

You're right, @Monsen. I started mapping the City of Brass a while back. The campaign ended before I finished.

There is a free utility called WinDirStat that graphically shows how big files are. You will see how large Windows temp files are! It's pretty good at tracking down disk space culprits.