The first time I started really using a computer was when we got one at home after moving to the U.S. - I was about 12 or 13 at the time.
I think we started with System Software 2.0(4.0), but it might have been an earlier version. Soon updated to System Software 5.0 and MultiFinder (and 4MB of RAM for multifinder). I remember the upgrade to System Software 6.0, because my copy of Dark Castle stopped working---eventually I figured out that there was a copy of System and Finder on Disk 1 and that I could boot from that instead of the external SCSI HD.
My parents bought the computer for office use in their jewelry design/manufacturing studio; so I could use it there when they were doing bring-kid-to-work-daycare, but they also often brought it home in the Mac Plus carrying case. I have fond memories of using the How to Use Your Mac tutorial: the mouse tutorial and the start was fun and something I could easily learn by watching; I remember the Finder tutorial that followed challenging as it had text instructions so at first I couldn't do it on my own and would need help---I think trying to do the Finder tutorial played a big part in learning how to read.
I remember using Mac Paint a lot, but also watching my mother work on the computer and wanting to learn what she was doing: Mac Draw (for jewelry design), Excel[2], and CAT IV (CRM). My pediatritian was also a Mac user and would go to Mac World and would give me disks with SWAG games he got.
Later when my parents got a Macintosh Performa 575[3] to replace the Mac Plus, they made the fatal mistake of setting it up at home---I wasn't going to let that multimedia machine go! Luckily they made a good parenting decision and decided it would be better for my sister and I to have access to the Performa since they could get by a little longer on the Mac Plus at their office. Eventually they brought the Performa to work and replaced that with a PowerMac 7200/75.
[1]: Side note: Around this time also saw 2001: A Space Odyssey for the first time; my father got it for me as a 1st birthday present.
[2]: I liked using simple expressions for calculations, but mostly making graphs; lots of pet graphs (i.e. 1 cat, and various numbers of fish).
[3]: Might be mistaken on the specific model.
There were other computers in the house as far back as I can recall -- first one I remember was roughly the size of a mini-fridge and had removable disc drives the size of a pizza box; no idea what it was beyond that. Dad was what you might call an Early Adopter.
Had a 3½-inch floppy disk drive. Agonized over getting 5¼-inch floppy drive also but didn't.
I was aware of Apple computers and might have looked into getting Macintosh Classic II but was swayed away due to perceived high cost. But my first clone PC computer cost me just about the same.
It had a dead tape-deck though, so I mostly read the manual(s) and typed "10 PRINT "HELLO"; 20 GOTO 10", etc.
C:
cd \
cd games
cd prince
princeNo Plus, no Applesoft BASIC, no disk drive. Loaded software off cassette tape.