Purchasing my first investment property. Already Has a tenant

[Cristiano Botticelli]

Im really excited to write this post.  I joined bigger pockets two weeks and today Im getting preapproved to make an offer on a townhome out of state.  I need some advice and direction.  Im sure some of this info is covered and I will do a search on my own, but I still want to see what others have to say.

So here's the situation.  Its a newer property built in 2008.  Currently has a tenant.  The tenant will stay.  They are currently paying a little less than the rental market in the area.  The rent will cover my monthly payment, association fees, and I can put some in the bank. 

I have zero experience with tenants or with leasing agreements.  I hate to jump into something without the proper knowledge.  If you have any advice from past experiences, I certainly appreciate your feedback