First timer at stocks etc : what should I invest in

I need some advice and guidance on what to invest in and what to avoid
I recently got the Robinhood app and want to make smart moves so I can make a good investment. What do I invest in, how much, does it matter the time of year? Etc. thank you guys ahead of time.

Ps Reddit keeps taking my post down for being too short so I’m just typing this to prevent that from happening again