Riding

So me and my boyfriend are dating for almost three years and we started having sex a year back, we do it almost everyday but the thing is I don’t know how to ride😭 is there any tips girls? Idk why I do it for like 4 seconds then I’m tired.. or the dick goes out.. idk if it’s because I don’t know how to ride or if riding is like exercise that I get tired so I can’t do it 😅 I’m so sorry for sounding stupid but how do I ride 😭 and how do I make it last for atleast a minute...