@codl if you're able to get a copy of The Art of Electronics by Horowitz and Hill, that would be a good place to start.
-F
@codl Textbooks are always way overpriced. Should you happen to come across a cheap version though, I highly recommend it as an introduction and as a reference for electronics! Note that the third edition is probably the one you want; the second edition was released in the 80s and while the laws of physics haven't changed, the stuff that you can buy has
-F