I also had a hand me down commodore 64 before that. My uncle donated this when he got his first PC. I taught myself basic on that. And with a few peeks and pokes managed a simple game even. Alas, I had no disk drive and never thought to actually save my creations anywhere. Like on the tape drive I did have. The commodore 64 was great though. And my uncle bundled some introductory computer science stuff with it (a primer on bits and bytes) that along with the excellent C64 manual went a long way to got me into programming. My local library was useless. I had no access to information. There was no internet (at least not accessible to me; I had not even heard of it). But that C64 manual got me curious and I had nothing better to do. I did not realize it at the time but that bit of commodore 64 documentation and computer science intro is what changed my life.
The PC I got after that was relatively boring because it did not include anything useful in terms of documentation. Starved of information, I dove into Wordperfect.