Fisting

So we tried fisting for the first time as we wanted to try something different we had foreplay for a good will and after a while he was able to fit his hand in upnto his knuckles bearing in mind he has large to extra large hands (that's the size of work gloves he has to wear and they are tight on him) we had to stop as it started to get uncomfortable. I knew I could take it as I pushed a baby out bigger than his hand. Has anyone else tried it im wanting him to go all the way next time but don't know if he can has anyone got advise is ther a better position to be in to make it easier we are young so we like to try new things to keep a spark with sex