Adafruit in particular is very good at providing step by step tutorials on how to use their products, most of them that are nontrivial have a little example project to go with them.

It's also been a good one-stop shop, if you want a little character display to go with your esp32 project they will have one, along with addressable LEDs, battery circuitry, etc.

It's a bummer both sites are melting down