Stock simulation- need help!

I’m trying to get the highest earning on investopedia (stock market simulation that mirrors the US stocks) until the 16th of Jan for a chance to get a 3% grade boost in my economics course.

All I know about stocks is that there is a difference in day trading and long term investing. I have no idea what to go for. I learnt a bit about PE ratios and how to see company potential but I would truly appreciate some advice or insight!

So far I’ve invested 25 shares in LLY, 10 in NVDA and AEHR, 20 in HOOD, 5 in AAPLE and STZ

I think it’s pretty obvious I have no idea what I’m doing seeing 🥲