How to kiss my boyfriend ?

Okaay . So I’ve been going out with my boyfriend for about 11 months now . We’ve never kissed and I have never been kissed . He has , but he doesnt count it because “it was with a slut and he apperantly had fishlips which didnt make the it count as kissing” Anyways . He really wants to kiss me (I could care less , it doesnt matter to me )

Im not the kind of person who is perfectly okaay with kissing and things like that . Thinking about it makes me nervous and scared .(He tried to kiss me awhile ago but I moved my head not knowing what he was doing because he was sitting beside me when he tried I thought he was just leaning o9ver me to get something) Espcially sonce my boyfriend is nervous about it , and makes it seem complicated . (He thinks that a first kiss is open mouthed )

People are always saying that its just like a little peck on the mouth at first (sometthing that you’d give family) But last night my Boyfriend asked if I would kiss back so im assuming that he might want a tiny bit more then a peck .

My questions !

So how do you kiss ? How do you kiss back ? What do you do with your arms or hands ? When is a good time to pull away without him thinking I didnt like it ? What if he does try to do open mouth ? (im not really comfortable or sure what to do if he does that ) What do I do if he does open mouth ? But more importantly what doyou do/say after you kiss someone for the first time ?