Don’t forget your personal exemption amount, likely you will end up in the 15% bracket for all your income.
The amount you can put into your RRSP is based on previous years income, not this years, so look at you last year’s notice of assessment to find our your RRSP contribution limit. If you haven’t contributed before but have worked, it should be a good amount.
And don’t forget you also owe provincial taxes, the have different personal ex4mption amount, but RRSP also reduces taxes owed here too.