there is a series of books by this woman named Barbara Oakley, she studied languages while she did military service because all throughout her schooling she felt bad at math and science, now she has a PHd in Engineering, you might get something out of reading them, the first one (or at least the more influential one) is called "A Mind for Numbers"

there are also other books you might get something out of, thinking about pursuing a career in web development, which is related to computer science and programming, too many to list, but a couple I've read recently and think are really worth reading are "How to Solve it" by G. Polya, and "Think Like a Programmer" by V. Anton Spraul

also, don't feel to down for flunking, or get the idea that vocational school is less worthwhile than University (short them, maybe, but if you're good, it doesn't matter if you didn't get a University Degree, I myself have a job as a Software Developer and haven't gotten a degree)

do be honest from now on, and stay disciplined, there was this guy (can't remember the name right now) who said that we aren't truly free unless we are disciplined, for we are slaves to our bodily urges, and to our laziness, or something to that effect

asking for help is a start, stay motivated!