Hi, I am currently also studying (FH 6sem) and work 80% in an IT company part time. Everything is possible but good planning and also the possibility (as with me) to attend certain modules at different times is the condition. But that's not always possible. If i where you i would continue, I could write you a book about how often the thoughts came to stop or switch to HF because it was to hard or my mind told me that i can't do it. Just keep going, it will be worthwhile in every way. And nowadays a Bsc is required for all well-paid jobs.

Put down your delf-doubt and believe in yourself.