The important part to know is that with edibles, the 'onset' of effects is pretty delayed versus smoking/vaping, and depends heavily on what you've eaten recently, edible type, overall metabolism, tolerance, dose, etc.

This is where people make mistakes and take, say, 10mg (a single edible gummy, for example), then don't feel it after 15min and take another, or maybe 2...and in 40min you're high as fuck. It's not like you'll OD, but if you're not prepared for the mental effects it can be stressful and slow to go away. It can also creep up so slowly you don't notice you're high, except you're studying patterns or colors or flavors in your own little world.

Like anything, go slow and be safe. Have fun!