$400 is still insane for a rusty frame.
You could take a look at the various projects related to plaintext accounting . Personally, I like hledger.
C is the lingua franca of computing, having a basic understanding of it is in my opinion an essential skill. So I would disregard the recommendations of learning Zig or Rust for now. These languages have their place but they aren't as entrenched and universal as C.
To learn C you could try a few of the exercises on the exercism C learning track. Another good project, to learn a new programming languages in general, is building a calculator that parses an expression like 2 + 3 / (5 - 1) and outputs the result while respecting the correct order of operations.
I am used to the uninformed complaining about Rust but suggesting JAI of all things as an alternative is new.
Technically win32 is cross-platform if you are using wine...
If anyone cares, GrapheneOS lets you override carrier settings for VoLTE. No workarounds needed.
This is misleading. For people paying for the IDE nothing changed, data sharing remains an opt-in option. For users of their free licenses data sharing was enabled by default. Still a shitty thing to do especially as it hits a lot of OSS developers but lets criticize that instead of creating memes that are misinformation.
I know the type. Usually the kind of confident know-it-all who refuses to learn anything but delivers changes really quickly so management loves them. I had the misfortune to fix such a project after that 'rock-star' programmer left the company. Unfortunately the lack of professional standards in our industry allows people like that to continuously fail upwards. When I left the project they rehired them and let them design the v2 of the project we just fixed.
Joining at this point would require an insane effort on the UKs side. I am pretty sure that an undemocratic institution like the house of lords would not be acceptable under current EU laws and that is not even accounting for the UKs voting system. The UK would also have to join the currency union. The last point alone makes rejoining very unlikely in my opinion. I think the only thing UK citizens can realistically hope for is, at best, something similar to the Norway model.

You could take a look at these courses for ASP.NET or Spring if you are looking for something that isn't JavaScript.