Let him watch some videos and play some toys by himself for awhile, thn slowly extend the timing. But once awhile, he might be clingy. Need to explain that you two are busy. And try to accompany him whenever y'all have time. I'm a FTM so i can't accompany my baby 24/7. I tell her that I have chores to do. Hope she plays on her own. Once awhile she gets clingy, on most days she can play by herself. I also try to give her many different activities to do. Like drawing, or matching ABC on the board.