I still have my Color BASIC & Extended Color BASIC books. I have lost all my shit in storage, but I have the CoCo I with the II "upgrade" (16->32k ram, and removing the chiclet keys for the curved ones). We had tons of cassettes and I wanted to donate to archive, but unable to find them now :( I'm worried it's too late with deterioration issues of magnetic media.

I was too young to appreciate what coding was, I could type in programs but had no real understanding of DIM. I thought it was cool that they had a memory map graph in the books to help you program images - you could literally see the array layouts IIRC.

I definitely wouldn't have understood assembly at that age.