1) take care of the neccessary things first (rent, bills & groceries).
come up with a plan of either who's gonna pay what or figure out how much ya'll can pitch in for each of those things so your doing it all together.

& also, keep in mind that just because ya'll might be able to AFFORD to have your own place together doesnt mean it will work out if ya'll dont talk about what is expected from each of you.
are you all gonna work as a team to keep the place clean and running smoothly or is one person gonna be a maid?
being able to live together successfully will take respect, common sense & self discipline.