Time travel is not possible, yet, but it's always a fun thought exercise to think about these types of situations.
What nugget of wisdom have you gained over the years that you'd give your younger self? Share it with the community, that way others who're just starting out can benefit as well!
I'll start: if I could, I'd tell myself to never give up game development, and as an added bonus, to start questioning the status quo way earlier. What about you?