Silva-
I'm going to correct your diet, to help you out. Here are some pointers.
Breakfast-Is this immediatly upon waking? at noon? You know breakfast was wrong. Oatmeal with
protein powder, low carb yogurt and berries is what I do most days.
Lunch-5 hours is too long. I rarely make it to 3 hours after breakfast.
Pre Workout may or may not be too long before workout. Most people say eat solid food 2 hours before, shakes one hour before. It really up to the individual. I do better eating solid food closer to workout. Like an hour, maybe 1.5.
Where's the post
workout shake? Whey protein, multodextrin and dextrose is cheap and effective.
Dinner-About an hour after your workout. Pork tenderloin is good, pork loin is probably too fatty. Corn is a carb as far as fitness goes, not a veggie. Use red potatoes or sweet potatoes instead of white. Don't eat anything white, really. No white rice, bread, etc.
You'll get there. I know you're just starting. I'm not coming down on you, just giving you some pointers, a few little tweaks, to get your fat burning going.