I looked at your maps and think they are well done. Extremely well done considering the limited tools you have chosen. I switched to a painter at around 40 years old and went back to college to finally get a college degree (BFA in painting). Working on an MFA now, but prior to all of this I was self-taught and worked with InDesign and Photoshop off and on for 15 years or so. Aside from books, I use to buy these huge DVD sets on Photoshop/Indesign/Illustrator etc. If the author and quality of the material is good those videos can impart an enormous amount of information in a short time. Over the years, those were marketed on Lynda.com. You use to be able to get a free 30 day trial at Lynda.com. More than enough time to sail through a lot of content. Otherwise, the fee is nominal if you have the time to invest in yourself in this way. Best of luck. You have great organizational and design skills. P.S. Back in my 20s I took this 5-hour Geology class. Was intense. But during the lab we’d spend hours pouring over USGS maps. You’d get a kick out of looking at USGS maps I’ll bet—they can be accessed for free online these days I’m pretty sure. Great source for Keys, features, and organization etc.