Okay so what are some techniques? ?

okay so i brung myself to give my boyfriend oral!! mkay so basically he tells me its great but i think hes lying im only putting my lips on and going up and down no suction no tounge action?? i dont think i can do the suction action yet i try but it doesnt work? i cant really multitask but im okay at it? i got him moaning but idk if im doing a good job? i go tthe hand actions down i think but sucking and tounge isnt working right? what are some things i can do with the tounge like go around it up and down?? help me?? and some ways to do the suction? for a beginner i think im doing good becuz i can fit almost the whole thing in my mouth without gagging much? its this good?