@Scarlet-Spectrum Hey~ You're not a bother at all; I'm so happy to get a question like this x) I'll try as best I can to help.
1.Okay so, to me, characterisation is not just about the character, but also the environment they interact with. So describe how they respond to their environment, what they interact with in their environment and what they do in said environment. So it's important to have a balance between the descriptions of what I said above and the character's appearance and mannerisms.
2."Show, don't tell." Is what I learnt from a couple of my high school teachers. This ties in with my other piece of advice- don't tell the readers what your character is feeling, show them with how they respond to certain events and the environment.
Sorry if I went off on a little tangent there somewhere, but I hoped I helped (I really do) as I've never been asked something like this before and I got a little excited x)
If you ever need any more tips, I'm happy to help, either through here or DM; you can message me anytime ♡
Also thank you so much for saying you love my writing; it put a smile to my face.