New to Househacking

[Andrew Thomas Vedder]

I have am closing on my first primary residence in June. The property is a 3-2 1515 sq feet. My girlfriend is going to live with me and I plan on renting out both other rooms. 

1) Do you think I should rent out both rooms with only one other bathroom available? 
2) The two other available rooms share a wall. Do you think this is a problem?

3) Where have other house hackers found success in finding tenants? Do you have a go-to site? 

Thanks BP.