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!

Here's something I've been working on. I 3D printed a bracket to hold a cheap video projector on a camera tripod. Why? To display maps, of course. Right now, it works, but it needs to be repositioned. It's small, but if it were any bigger the players couldn't fit their books, dice, and chips/crisps.

The map is a bitmap export of one of the Cartographers Annual maps. The most difficult part at this point is aligning the map grid with the grid on the whiteboard. The angle, focus, and zoom of the projector must be set once, and then you must align the computer display with the physical grid. If you have to scroll, then you start over. I think I need to buy a board with no grids and just use the ones on the map.

I plan to run a game soon. I'll use my own maps. I can't show them here because I don't want anyone involved to have an early peek.

I can only give feedback on one point. Yes, your maps are great. I think the love that you put into them is important, and it shows in the output.

However, you may be asking the wrong crowd. We're probably the least likely to want to buy maps, so maybe we don't know as much about the needs of other people. We can make our own maps!

Seriously though, you're on the right track.

While we're doing this, here's Sue (unrelated to anyone here). She helps me map and write code. She wants to give more input than I'd like, but she's welcome to watch. She buries her head under my arm, and I finally got a photo of it.

Sorry, yes it was the DMG. I didn't know one particular rule, so he handed it to me to use. I handled it /very/ carefully.