Opinions

So im not a poster ill say that off the rip .. basically i CAN do stuff but honestly my bf has a big dick im not really 1 for like riding and stuff or giving head cuz its really thick shit makes my jaw hurt lol .. but lately ive been WANTING to do it more i started with more bjs but now i wanna try riding trust me i dont need lube BUT whats the best way to ride when you dont think you can take the FULL thing .. like a start off shut i do it on my feet so i can control how far i go down or just say fuck it n stay on my knees ? Abd on my knees should i rock or bounce .. i really wanna get it cuz its really gonna make him happy n in turn turn me on