I’ve seen a 15 inch 2012 running Sonoma dual boot with Catalina for 150 bucks. I might just get that and transplant my 16gb and my 1tb SSD over? Will that be possible?
My 2011 is very very beat up to be honest. Here’s a pic just for the comedy value. 😂 You not seen the ubderside
According to MacTracker, the 15" 2012 can run MacOS 10.15.17, which is macOS Catalina. I don't know if it'll run the programs you're trying to run on it. *I DO NOT THINK* ABLETON 12 and WhatsApp will run on Catalina, but more websites should be able to load.
For moving RAM over, I don't think it works. MacTracker says the 15" 2012 requires 1600 MHz Ram, while your machine requires 1333 MHZ RAM. The hard drives should be compatible (you will need to reinstall MacOS, since the machine and graphic cards are different).
The Mid 2012, 15" also had problems with the external graphic cards as well, if my memory serves me right.