Maintaining an aesthetic is very difficult, believe me I've tried..
HOWEVER there is a way.

1. Research the things you find intriguing about your aesthetic or that you love about it.

2.Check out websites that sell clothes that match your aesthetic; for example I would look at Romwe, Zaful, Dollskill etc

3. Buy clothes from there OR if your not very rich look at your own wardrobe and see how you might be able to modify your own clothing to match the aesthetic that you like.

4. Recreate photos that you like, so you are able to look at how you were dressed, how your makeup was done, etc.

5. DO NOT expect it straight away it does take time.

6. Don't allow peoples judgement to affect you, keep doing what you like ;D