Any mummies babies around 3 months plus but yet don't know how to tummy time and flip over yet?

My baby only tummy timed in is third month. So it is only recently that I managed to tummy time my baby. Initially he whined a lot when I laid him on his tummy. I made it a point that, everyday, same timing, while he is playing, I'll roll him to lie on his tummy. When his head faced down the play mat, I'll help him adjust to turn side ways ( so that he can breathe). Eventually everyday I keep doing, don't care if he likes or don't like.. I realised the more he doesn't like, the more he will lift his head up and finally he lifted up at least 45 degrees now! Also using devices and gadgets can help with tummy time. I use the lamaze tummy time spinner product.