Teeth brushing

I’m looking for advice to help my almost two year old brush his teeth. He’s not talking yet but understands every well but when it comes to brushing his teeth it’s never goes well. I try to make it fun and I try to make him laugh so I can get the tooth brush in there, I’ve tried videos and songs, different toothpastes, I brush my teeth in front of him and tell him how important it is that we brush his teeth everyday and I try my best to make it a positive experience but it always ends up in tears and I make sure to stay positive the whole time. I even let him do it himself which he likes but of course he doesn’t do a great job because he just bites the toothbrush so when it’s time for me to help him he freaks out. Any tips would be a great help, thanks!