Sup /fit/ /pol/ here (don't worry will keep politics out of it for the most part) I'm trying to get into shape so I can join the army/marines (yet to pick and yes this is the extent of the politics I'm bringing in here)

I'm wondering what I can do to get into shape.

What gym I should choose.

What foods should I eat

etc.

I already made progress I lost 5 pounds over the course of a about 2 weeks I cut out pops etc, but I know I got a long way yet to go.

Thanks in advance.