aru not a student but a sibling goes to mhs. he usually wakes up at 6am and comes back at 5/6pm. we live 30km away too so it takes around an hour to get there 🙂 hope this helps a bit
EDIT: i forgot u asked if it was worth it. if ur truly looking for a competitive school environment or js rlly want to go, then go for it! u can always leave if u dont like it. while i dont know how far away you live, i would say that if you leave at around 8am or 7:45am you would get there on time (unless u live close by). also remember that it takes slightly longer to get back home than arriving, and you most definitely get homework so unless u want to sacrifice free/study time, make sure you can get home at a good time 👍️