A few unwise life style choices later and I find myself running a small IT company for the last 25 odd years.
I'll never get beyond undergrad engineering maths n stats but it's works like GEB and the Natural Numbers Game (and I see there are more) that allow civilians like me to get a glimpse into the real thing. There is no way on earth I could possibly get to grips with the really serious stuff but then the foundations are the really serious stuff - the rest simply follows on (lol)
Whom or whoever wrote the NNG tutorials are a very good communicator. The concepts are stripped to the bare essentials and the prose is crystal clear and the tone is suitably friendly.
Top stuff.
(My making an easy fun game of proofs, I hope we can introduce them far earlier in the school curriculum. How many people in this world really understand the difference between reasoning and charismatic rhetoric? I don't blame anyone that isn't given the way we are taught.)