Tummy time

Me

My son is a little over 3 months old and all he wants to do during Tummy time is suck his hand! He can lift his head up for a second but puts it right back down only a few times. He just goes right back to sucking his hand if I try to take it away. I try to get him interested in a toy instead but he’s not going for that lol I try not to compare to others because I know all babies are different but should he be able to lift his head more? And do I need to really try to get him to stop sucking his hand so much during tummy time? Is it making tummy time less effective? Sorry just an over concerned ftm here lol