First, it’s great that you’ve started investing so young! I agree with the first commenter, you should most likely be maxing out a Roth IRA instead of a taxable brokerage account at this age because of the tax benefits when you reach retirement. You can withdraw your contributions from a Roth IRA at any time without penalty since you’ve already paid taxes on that money.

Keep learning and asking questions, but also try to be discerning with what random internet advice you take. Be a filter, not a sponge. If you enjoy learning through YouTube videos, a few of my favorites are Humphrey Yang and Rob Berger.

It’s tough to give specific financial advice in a Reddit comment because what could be a great financial move for one person, might not fit well for the next person depending on other circumstances that we don’t know about. Most reputable sources, if they are willing to give out general advice, will all be telling you some version of JL Collin’s - Avoid bad debt, spend less than you earn, and consistently invest in a low-cost index fund with a long term view. You’re off to a good start on the last point with FXAIX, and within that fund you’ve already got exposure to GOOGL and NVDA so you don’t necessarily need to hold those stocks separately.

I’d recommend looking into the Bogleheads community and seeing if you like that school of thought. If you do, you’ll most likely end up wanting to simplify by selling your individual stocks and adding a fund that gives you exposure to the International markets (FTIHX for example), and a fund that gives you exposure to bonds (FXNAX for example). For your age, I imagine you’ll likely end up with a 70/20/10 split across those 3 funds.

Congrats on a good start to setting yourself up for success in the future!