You can experiment with your timetable in the first 2 weeks of semester before timetable changes are closed (you can still go to different lecture streams throughout semester) so maybe try stacking up as many classes as possible into a couple days/few days or spread it out across the week.
First semester I had 4 days a week with a fair few breaks on a few days, I found that pretty annoying tbh especially when you only go into uni for maybe 3 hours then have to go home...
Second semester I had 2 full days and 1 day with a 1 hour lecture and had to go since lectures weren't recorded -.- I think I eventually went to a later lecture on that day for another subject instead so it wasn't a wasted day.
I prefer to try and keep the number of days going into uni at a minimum because of travel. Probably takes me around 3 hours 40 - 4 hours everyday taking into account waiting for bus/trains. I reckon it's good to have a break at around 12-2 since most people will and it's a good time to catch up with some friends. Also try not to have massive blocks of breaks like 2hours+, I found that having less than 1 hour break sucks because there isn't really enough time to do any study or chill with people and 3 hours+ is too much time since you'll procrastinate. 2 hours is a good block for a break I reckon. But whatever suits you is fine

Also for the Frankston line and same applies for other lines I guess, avoid taking peak hour trains home. It's ok on the way to the city since we're at the end of the line and get a seat, but it sucks home bound! Once I was in a train in peak hour and people were standing in the aisles and at the door entrances really packed and squished like sardines. No one got out of the carriage till Cheltenham/Parkdale that's like 40 mins or so! Freaking crazy.
School time in the afternoon is really annoying. You get school kids get on in mass hoards, they talk so freaking loud and compete to get their message across which only increases the racket they make lol The best time for trains I reckon were peak hour in the morning (if you get a seat lol) most people are going to work and are fairly quiet, keeping to themselves or sleeping. It's nice and chill. Also, noon trains on the way home are nice and quite too, you won't get many people on the carriages.
Also, since you're studying Arts your contact hours will be fairly low. You'll probably be able to squeeze it into 2 days maybe 3!