Checking my portfolio

I know these questions get asked a lot but I’m gonna ask anyway lol. I’m 19 and I just maxed out my RothIRA and am choosing what to invest in at the moment. I use Fidelity and was thinking to put 80% FXAIX 15% FTIHX 5% FSSNX. I’m very new to investing so I’m still doing a whole lot of research. Thanks in advance!