Well, if Horowitz and Hill aren't doing it for you I'm not sure what can help, short of trade or professional training.
What kinds of things do you want to be able to fix?
I got "allergic" to computers but I still like algorithms and playing with mathematical/logical structures.
I spent some time in the Australian outback with nothing but a pencil and a block of paper.
I had heard of topology in science fiction books so I decided to study that from scratch.
Soon I had discovered a family of hyperdimensional geometries that led me to an efficient algorithm for the complete resolution of a traveling salesman problem and a non-Boolean logic.
Therefore I think that creativity (work!) in preparation for coding doesn't need anything but a curious mind.
I think it's a matter of convention, and that all the maths I can think of survives the following definitions:
If infinity were to be defined as immeasurably large, and zero as immeasurably small, we would be saying infinity=(some finite number)/0 and 0=(some finite number/infinity
This still leaves us unable to find an definite answer to the multiplication of 0 and infinity, because we might have chosen any 2 finite numbers for the definitions above.
It looks to me that rich celebrities have to spend vast amounts on security. They can't go to the beach; can't go to the supermarket; can't in fact do anything normal.
Some very rich folk I know are discreet with their wealth. If they were show-offs they'd need lots of security, but nobody knows them so nobody tries to take their things or hurt them.
Do you think that there might be hot springs on the Moon? Why not... our volcanoes on Earth bring water to the surface. That sounds like the kind of discovery that this mission is all about.
Anybody not a doctor who gives medical opinions online to anonymous questioners is probably not very good at thinking and can't be expected to give useful answers.
Perhaps you could speak anonymously to a doctor or nurse practitioner by telephone.
(In Australia such a service is run by the Federal Government.)