Grant him genuine agency and let him take the lead.
When my oldest was about 16 months old, he decided to put his own dishes away, just like mom. He was too short to reach the sink and began chunking his dishes into the sink like a basketball player, because that was his relationship to the sink, height wise. A lot of parents would have told him to stop and tried to then teach him to pick up after himself later. I felt that was the wrong approach. Instead, I locked up all glassware and all members of the house ate off plastic bowls and plates and drank from plastic cups until he was tall enough to put his dishes in the sink without chunking them.
I told this story once online to someone hoping to foster independence in their child. They thought it was a great idea and announced that they would start making their child put their dishes away post haste. Uh, no. You have completely missed my entire point.
Support his interests as best you can while helping him not hurt himself. It will go stressful but good places and you will have a really neat person on your hands every step of the way.
I do have a private parenting blog that is currently on hiatus. You could send me a gmail address with the subject line "Memoirs of a Mom" and I could add you, if you care to see what is there already.