Focus on 1 or multiple at a time?

I want to start buying some individual stocks as I begin my portfolio. Is it better to focus on 1 or multiple at first?

Let’s say I want 20 shares of 5 different companies. Is it better to buy 20 of one little by little, then the next and so on or is it better to buy 1 share of each as time goes on until I’ve reached my goal?

Sorry if this is confusing because I confused myself typing it!