Fitness: 3x10s are fucking fantastic, I should have followed a plan sooner.
Nutrition: Eat stuff like rice and tuna, cook more shit, don't buy frozen food or eat chips regards even if you're 6'1 82kg and need to bulk
Life: Everyone is pretty retarded and it's easy to be above average, people will complain and make things sound difficult, like working hard, but it's easy as fuck and you're killing yourself for overthinking. Getting a job is necessary for you to be able to interact with people properly and be happy, just don't be a fucking retarded and have no hobbies outside of work like further studying. You can gain confidence, coolness and happyness after 22 years old, like I did, just be very nice to people and practice putting yourself out of your comfort zone by asking questions about people. Conversation isn't hard, most people are only slightly less capable at conversation than you. Also make eye contact and shit