Need advice

I have a 3-year-old son. Overall he's a great kid minus the few tantrums he throws every now and then.

My question, what kind of things do you talk about with a 3-year-old boy? I feel like I'm lacking on my end with conversing or asking questions... I want to bond better with my child besides just disciplining when necessary. One thing I am struggling guilty is being on my phone looking at Facebook market stuff... I HATE it! How can I break this habit? No judging please, friendly suggestions are allowed!