Here I'll be giving tips and tutorials on how to help better trap, and crossdress.

Requesting a full body picture and a close up face picture since it will help on what whomever needs to trap.

First of all is make-up.
Depending on your cosplay and how your face looks without make up it can vary from taking an hour to put on, to just five minutes.
The things you're going to need BEFORE you even think about make up is facial care. This includes cleansing washes, facial scrubs, avacado masks, to the basic every day clean-n-clear.
ALSO REMEMBER TO SHAVE BEFORE YOU PUT ON MAKE-UP, I can't count how many guys I've seen put on make up and it's ruined because they didn't shave that day.
Waxing also helps, but usually thats for your armpits, back, legs and etc.
Think about this BEFORE you start trapping, and are in otakon, since it will help your skin and what you have before hand.
The basic things you'll need for this of course is Foundation and Concealer.
These help you cover up any obvious acne scars, pimples, and imperfections on your face.
NOTE: If you're going a tone lighter or darker than your skin, you might need to have it down half past your neck.
After applying a layer of foundation, the next thing you want to work on are your eyes.
For your eyes the basic things you're going to need are a small pallet of eyeshadow filled with skin colours and other colors for making any effects you want. Preferably atleast a 4x4 size
Of course you won't be using the skin coloured parts for your eyeshadow, this will be used for any facial contouring you may need if your manly features stick too much.
For the others you will need to learn how to do them on your own. There are various eyeshadow techniques on youtube that can help you.
Of course that's if your character wears eyeshadow.