u/Frequent-System-6565

I am 20 years old and have been investing in a Roth that I opened when I was 16. I have just over $18,000 in the account. Currently I have just invested in VTSAX and have let it ride. I feel like I am missing out and would like to invest more aggressively. Any idea which funds I should take a look into? Any and all help would be greatly appreciated!