New guy... Need Help!

Well to make a long story short.... I am 26 year old male. I was in great shape going into college but that is where my downfall began. I entered college at 6 ft 200 lbs and athletic. I left college 5 years later at 6 ft 280 lbs..... I am finally sick of my new body and im fully ready and 100% committed to doing this. The only problem is I need help. I am not sure if I have Type 2 Diabetes or not but just my main health has had me feeling tired with not much energy. I am going to start exercising tonight, I need to start slow bc I havent done a whole lot of exercising the past 5 years. Well here are soime symptoms that have me feeling a little freaked out lately... For about the past 3 months id say every once in a while in the morning I will wake up with tingling fingers and hands. I am scared about that, I have also had a little bit of chest pain lately, nothing terrible but small pain here and there. I am scared but I also dont have Insurance right now. I just got a new job in Construction which thankfully gives me a little bit of a workout as your on your feet all day, however I dont get insurance until I have worked 500 hours... Right now im at 150 hours. I kind of want to wait it out but im also kinda scared and want to just get my mind right and figure out how to get healthy again. I dont know how to eat or count calories, I have never done that. I usually just throw something on the grill, grab some fast food, eat junk food... i need to stop all that. What are healthy food options for Type 2 Diabetes patients? I want to go to grocery tonight but i dont even know what to get