[HELP] Loseit, I need some help on how to start (routines, food, etc.)

Ok, here's the deale,

Next year I will have access to a proper fitness facility at a university will more than I think is needed. Right now, I am not in very good shape at all , but I want this to be the time I turn around and become healthy.

The only problem I have so far is that I have no clue how to start. I don't know how to plan logical and healthy routines (when/how often should I do cardio, weights, etc.). This is what I am really confused about and what is mainly restricting my start.

I know this question has probably been asked before, but please, I really need some guidance here. If it has, could you link me to said posts? I came here because I know you guys will help me. Thanks a lot guys.