I think I started with 16. I think it is normal to think that make up feels weird if you are trying make up routines from 2016.
Start with a little bit. Concealer, mascara, brown eyeshadow and see what you like. If you like blush on other people, maybe you will like it on yourself also etc.
I do not have sensitive skin but acne prone skin. I like Loreal, Catrice and Essence as a cheaper brand to try stuff :) I would stay away from lux brands if you never handled make up before. Basics are completely okay and won’t cost up to 500€ then.
I like the Loreal Age Perfect BB Cream.