How can you be a better looking guy?

16 is a good time to start or later or sooner.
Weight loss is good.  I wouldn’t start there.
I would first begin with self care i.e.  Make sure you have good soap and water and shower or bathe daily.  A good woman likes a clean man.  I never understood that stuff about scruffy and unclean and no bathing.  That to me is wrong and stupid and unhealthy.  If you already do this, good for you.

I would find one healthy food that you like and concentrate on easing that into your food that you already like to eat.  Once you get the good food in then remove one thing that is a junk food….pizza, candy, hamburgers, French fries, cake, pie, cookies, soda, tacos, ice cream….just one, not all.  Pick one good food: apples, oranges, watermelon, cantaloupe, lettuce, tomatoes, yams, green beans, spinach, collard greens, kale…just one, not all….and slowly introduce it into your meal plan.  Easy on the dressings and sauces.

I would read like you are doing on Quora and learn about how people think and act.  This is a good, safe forum.  Or, go to the library and pick out a book and read it.  Don’t read on line.  Actually hold the book in your hand and read it.  “Men are from Mars and Women are from Venus”.  There are tons of good books.  Take some home and read a little each night….just a page or two….not the whole book.  You need your sleep.

I would go to bed by 10pm after you have done your chores.
At the library, find magazines that show you how you would like to look and make a copy for you to bring home.  Put them on your door or wall in your room.  If you can, put them on your closet door where no one can see them but you.

I would get some good shampoo and conditioner for your hair.  Wash and rinse your hair well with warm, warm water.  Don’t leave anything in.  Only leave in leave in hair dressing.  Brush your hair every night with a good clean brush.

Drink water like it is going out of style.  If you hate the taste, put a little juice in it ……not too much. 
Find a good hair stylist and get a nice hair cut.  Don’t go to a cheap place.  Find a good salon near you and watch how the stylist cuts hair. Get a fresh haircut every 8 weeks. It is probably more than you can pay. But, a good hair cut especially for men is a great thing.

I would get a part time job close to your house.  If your parents don’t want you to work, ask them what you can do in the house for money.  Don’t get your chores mixed up with the work you do for money.  Keep them separate.  And don’t ever expect your parents to pay you for chores.  That is your contribution to the household where you get to live for freeeeeeeeeeeeee.  Don't talk trash and mean to your parents ever....even if you think things are not right.  Just be nice and do your school work.  Keep quiet or talk pleasant to them....like hey, how ya doin' and smile a lot and listen to them.

Women like men that provide security.  Become a man that can and will do that for the ladies you like.  Don’t do something like go up to them and say….I am here to provide you with security. They will laugh you out of the room. While in the library read about what providers do.  It is not what you think it is.  I guaranty it.

This is a start to being a better looking man. Takes time and work.  Oh darn, there is that four letter word,,,,,,work. Yep. 

You can do it.  Stop feeling sorry for yourself and if you really think you are depressed after you do these suggestions then go to a clinic and see a doctor or counselor for help.
Contact here when you have done some of these things and they are actually part of your life and let us know how you are doing.