Don't worry my son is 5 mths and hated tummy time, now he turn himself over and gives it to himself. I had to start him off with him lying tummy to tummy (me lying down with him on my tummy). I also found that he liked lying on our bed with me for tummy time. Sometimes getting down with them and keeping them entertained by talking or shaking toys will distract them. Also I found the time of day made a difference, like after a good sleep aslong as they are not starving.
Goodluck