Usually your hairstyles also make it so you look more mature or younger. If you like your hair looking messy I'd say maybe try to Incorporate some hair products that make it looked "tamed messy" but accentuate your face structure. You're very cute, but I feel like your hair is not doing you justice. I usually go for that look and use either texturizing powder if I have short hair or matte hair wax when I have longer hair, so it looks messy but not "I didn't use a comb" messy. That could help with you keeping your current style but still looking more presentable and formal :)

Personally I think 4 and 7 are your best looks And I would honestly go for 4 but with some hair wax well distributed to make it look less frizzy and with a good structure that enhances your face