Hello :) please help me, I am going on my first airplane/vacation!?

TT has covered the process for you. As for carry on hand luggage you cant take any liquids, aerosols, deodorant in any form, toothpaste these go into your hold luggage, drinks etc cant be taken on board unless you are buying duty free for which you will get a receipt and they are in a sealed bag. You can take cosmetics as long as they are in a see -through plastic bag and they will be scanned separately from your hand luggage.