It sounds like you’re putting a lot of emphasis on “looking good” but most women won’t think that’s enough (unless you are male model good looking) and they are going to be attracted to a lot of other qualities such as confidence, humour, social skills, and flirting skills.

It sounds like you are not really sure how to interact with women in the right way which I was the same in high school and early days of uni.

I highly recommend checking out a book called the “Mystery Method”. It outlines the process of meeting a woman to getting intimate with her and a lot of very helpful tips. While it is a book that comes from the “pick up artist” scene which gets a lot of flack from people (mostly because a lot of guys who do study PUA are not great people), the information itself is quite valuable and can really help men get better with women.