What is a fair ROI on a $500 investment? Lowest amount y’all would take for a profit?

Howdy, I’m still a newbie when it comes to investing; I bought $500 worth of stock and was wondering what y’all would consider a fair profit on this. I don’t want to leave it in there for years to possibly double the money, maybe a few weeks or months. I don’t want to be greedy and lose if the stock takes off, but don’t want to hop out too early. Any tips y’all have would be appreciated. Thanks