Ordacleaphobia
Shameless Contrarian
Sucks you weren't ultimately happy with it, but it sounds like selling it was the best answer and leaving it as-is was gunna bug you. Glad they were open to it.
Definitely pick up a beater and screw around with it, something you can afford making mistakes on. When I first started to take guitar seriously I bought myself an old Gio with the mission of trying to make it play as good as I possibly can (or at least as good as my others) without fear. If I screw up and damage it, I'm out like a hundred bucks and some time. The knowledge I gained from that thing is priceless.
Definitely pick up a beater and screw around with it, something you can afford making mistakes on. When I first started to take guitar seriously I bought myself an old Gio with the mission of trying to make it play as good as I possibly can (or at least as good as my others) without fear. If I screw up and damage it, I'm out like a hundred bucks and some time. The knowledge I gained from that thing is priceless.