How to entertain a 2-3 month old baby

My son just turned 8 weeks, he’s more awake now and alert so I’m talking more to him, we do tummy time, and I put him in his swing. But after we do all of that I run out of things to do with him so I just let him set on his boppy lounger. I feel like a bad mom when he’s awake and I’m just doing nothing or on my phone because I have no idea what to do.

Is there any other ways to entertain a baby? Or do things that will help his developments and cross more milestones?

HELP a new mom!! lol