Alright. This is coming from a guy. I agree with smiles on the fact that moving to fast and to much tongue is a no. My first kiss was awkward, however, she kissed me first. I was standing in the street and her sister went inside and she just tackled me and started making out, I was freaked. My second kiss was just someone random that wanted to know how I kissed, ANYWAY! That is getting off the subject. Back to you Bryan. Make sure your eyes are closed and you don't rush it. Start with a peck on the lips or better yet, to show her you don't wanna move to fast, on the cheek, then back off,look at her a bit, then move in slow towards her, if she lets you then kiss her softly on the lips one time, don't rush it, let her control this. Some people aren't comfortable to kiss after a month or so. Anyway, open eyed kissing is rude, remember to keep them closed, keep the kiss slow, if she wants faster, let her increase the speed.
Now to weirdo, from a guy, the dude that tried to make out with you, depending on what it was that you did to refuse, probably either feels stupid or understands that you don't want to. Same thing applies, keep your eyes closed, start it slow, as I said the girl gave me my first kiss and just jumped into a make out session, I was freaked out. Start out by just rubbing his cheek or something, coming from someone I really like, that is something that I enjoy. Then with slow movements just lean in and kiss him with a peck. After the first peck lean back to keep eye contact, then lean in with a more in depth open mouth kiss. Just don't open your eyes, I hate it when girls stare.
Good Luck to both of you. I hope my advice helps.