ZippyRedPlumber

I would download the source for some simple projects included with the basic compiler and start by learning to modify them.  Figure out what each section does, etc.  Lots of good, relevant threads int he programming forums, such as: 

 https://www.randomterrain.com/7800basic.html

Hey zippy! 

Good luck with it - I'm loving using 7800basic ATM and the forum is very supportive will any questions you might have.  

If you haven't already you could try my extension for Visual Studio Code - Atari Dev Studio.  Read more here. RandomTerrain's site is a great help as noted above.

check out ben heck specifically his handwired 2600 and I believe he did a 7800 as well he doesn't go too in depth but he does show some code