There has been lots of good info posted here already, but I’ll echo that I believe diet is by far the most important variable you need to get right.
Training wise, just pick a program on this website. But you really need to learn how to eat for gains. I’ll share here how my diet looks from a food selection perspective. It was designed for me by Paul Carter, which everyone will agree is probably as knowledgeable and elite as it gets when it comes to training and nutrition. I won’t specify the details and quantities because I feel it wouldn’t be fair since I paid for this. But here are some of the foods I eat on a daily basis:
Breakfast
Eggs, whole + egg whites
Mushroom, spinach, tomatoes
Bacon
Cheese
Cream of rice
Snack
Banana
Whey
Lunch
White rice
Salmon
Walnuts
Veggies
Pre workout
English muffins + jelly
Whey
Dinner
Potatoes
Ground beef
Veggies
Snack
Rice cakes + peanut butter
or
Toasted bread + jelly
Egg whites
Whey
You should probably take note and you’ll see this is pretty consistent with other successful meal plans and the ones that other users have posted here yesterday