OP, even after your second post it didn't become clear what exactly you're planning to do. OK, your Mac is too old to instal Bitcoincore and run a node. But why exactly you need it. Why lightweight wallets like Electrum isn't an option for you, I'm sure that it would work on your Mac. Yeah, you won't be able to run a node on it, but do you really need it?
And as said above, why exactly you need Mac? PC's with Windows OS is significantly cheaper. And you can buy decent used PC for much less than $800.
And finally, you haven't explained clear enough what you're planning to do next. Because now you just come to forum asking money from random strangers, do you expect that money comes so easy. After all, Bitcointalk isn't crowdfunding platform.
I dont know what will struck me about this technology in a month because there is so much to it, but as an artistically oriented person I want to delve into it and have gear necessary to do it, with more space than the previous one and some livability.
I want to connect these two things especially that basic music software from apple is something that I tend to use and I am used to that hardware too.
As a programmer/computer scientist you might look for practicality in its own terms, I know, it might not always work with things like music and art in general from my perspective, but yes maybe I should consider getting a windows laptop for a while.
By the way, there has to be some field of connecting artists and cryptocurrency economy and development other than NFT, is it somewhere underground or am I just a new weirdo?