About tongue kissing?

Okay me and this boy i liked were in my room and he wanted to kiss me (he is way more experienced than i am) i dont even know how to and he doesnt know i dont know how to. So um i started to tap him and then i dont really know how i did it but my mouth was open and his tongue was in my mouth and i think i twirled it instantly but than i got scared becuz my friend popped into the room when she left i decided to try again this time his tongue was way deep in my mouth and i didnt know what to do i froze i tried to move my tongue but it seemed like i couldnt. Then he just started sucking my lips and biting them and then i jus kissed his top lip but i wish i knew what i was doing and there was kinda alot of saliva but i dont kno either if it was from him or me. srry for this long story but can anyone help me or give me some kind of technique or help on this.