You seem to start a lot of threads about things you're planning to do yet you don't seem to actually do them so perhaps just start slowly and try to stick with it.
I mean at the start of 2019 you were thinking about doing a maths degree, I took the time to reply in that thread with a bunch of course recommendations + a book recommendation for you:
https://forums.overclockers.co.uk/t...-degree-does-anyone-have-any-advice.18845165/
Then months later you were asking again:
https://forums.overclockers.co.uk/t...maths-required-for-game-development.18872728/
So 3 years later have you actually done anything? The first book of the three you've mentioned is fairly basic so I presume not.
Why not just buy one book and try to get through that first perhaps.