My grandparents just gifted me $30k as a graduation gift. How should I invest it?

I'm 22 years old and just got the largest amount of money I've ever had.

How should I comprehensively break up that $30k into a solid investment? I want to see (optimistically) $300k in 10-15 years. I was thinking companies with a lot of potential, NVDA, PLTR, more recently RHM ($800m EU military investment) and TMC (TMC $500m Arizona investment). Or perhaps I should just put it all into a mutual fund and forget about it? What do you think?

[Pic of $30k](https://imgur.com/a/aXDV03A)