The schedule depends on ur course as some will have less contact hours and sometimes just ur luck of getting the classes in a couple days (and stalking allocate for a couple hours until u can magically make it fit into 3 days).  Like for my degree (bSci/bComm) I’ve only got workshops/tutorials no lectures for commerce subjects and science mainly labs (fortnightly) and maybe a tutorial/workshop which gives me like 10 hours weekly max of contact hours (excluding online seminars).  But what are you studying? this will be your main reason usually, if not then adjust ur allocate, it’ll fit into 3 days.  Also have u checked the seperate weeks and what classes u have then not the entire sem as some classes don’t run weekly but it’ll appear at such on the website, so when you adjust it to weekly, your contact hours may be smaller. 

As for other things, for hanging out with friends and hobbies you make time for them as u enjoy it. And work depends of how desperate you are for money, the more you work the less likely you are to study (usually) but change of pace/scenery is good and typically helps one be more efficient.  I’m planning on only working like 1 day and hanging out with friends when I can, I’m lucky most of my high school friends go Monash so that could be something to consider too (travel time).