Haven't been in a while, what to do?

[delta k]

I haven't been to the gym to lift in about 2 months. I have been playing baseball and running, but my diet has suffered and I've lost a lot of weight/mass.

Tomorrow is my first day in the gym. What type of program should I do? I'm open to lift as often as possible/needed?

Should I do any cardio? I'd like to start swimming- how do I fit this into my schedule?

For the record, I'd like to get bigger and stronger! (Lol).