Newbie looking for financial advice.

Hey guys! I'm looking for some advice. I recently graduated and landed my first real job. I'm 25yo, live at home with the folks. I'm comfortable with living at home and they don't mind. No plans to move out in next 3-4years. I have no car atm but would like to get one within a year (if possible...depending on your suggestions). Right now I just use one of my parents cars to commute to work (only a 10min drive).

Debt: 35k student loans.
Assets: less than $1000 + TFSA 100bucks... only b/c the RBC advisor said they would waive the account fee if i opened a TFSA with them. Aaaand thats all I got. lol

Income: About 3500/monthly after tax. I also plan on doing some PT work for another 500-700/month. So we'll say 4k/monthly income.
Expenses: minimal. I spend about 1000bucks helping my parents with the bills, grocery, gas, etc.

Questions: how much should i be saving (15% of net income? more/less?), what should i do with those savings (invest, leave in bank account, put towards TFSA...)?
Should i focus on paying off the student loan first?

I haven't thought about retirement or RRSPs or anything like that. Like I said, I'm very new to this. Basically just worked summer jobs during uni and paid off my credit card. :)

Thank you!!