Okay first of all to be aesthetic you have to understand different types of aesthetic, there are so many and since I am NOT really an expert I don't know all of them, but I'll give you a short run down on some of the most common aesthetics to start off with :)
Bambi Aesthetic
Honestly I think that the bambi aesthetic is one of the cutest types of aesthetic, but it is probably also one of the hardest to maintain and bring into day to day life. Honestly their personalities can range but I'd imagine them to be, shy, cute and kind. Commonly bambi aesthetic people mainly use/like colours like :Peach
White
Pink
Blue
BrownHere are some examples of bambi aesthetic:
{not my pictures}So yeh, it's kind of just got those cute vibes.
Grunge
Grunge is also one of my favourite aesthetics however I think I prefer a bit more colour than grunge offers but never the less I still love it!¡
Grunge people tend to wear black clothes, occasionally with a flannel of some sort, their typical emotions are normally deep, reserved and sad (but not always!). Grunge people always kind of have that rebellious vibe about them which I fricken love.
Here are some examples of grunge:
{again none of these are mine}