i think that between the instruction sheet and the advice above, you pretty much have the idea covered. i have a few suggestions for you however.
1) big on RELAX...the first couple of times i tried to insert a tampon, i was so uptight you couldn't get a greased pin up in me with a hammer. haha...a little vagina, pin, and hammer humor for you! don't try to insert a tampon when you're pressed for time or when you aren't in the right frame of mind. sit on the toilet for a minute, relax, take some nice deep cleansing breaths, and take your time.
2) don't put too much pressure on yourself to have it work. just "try" it...if it doesn't work, don't flip out - just try it again or try it another time. you will have your period for many years, and you have that long to look forward to finding out how to use a tampon successfully. take the pressure off.
3) using tampons is a convenience. remember that it's not a necessity...right? it is a convenient thing to do and it has advantages over using pads. personally, i use pads 90% of the time because i think it's a healthier choice to make, but i'm not denying that tampons have their proper place (no pun intended)there i go with the vaginal humor again.
4) worst case scenario, get your mom to coach you through it, or even ask one of your friends. i don't mean have them guide your hand or anything like that, but have someone talk you through it on the cell phone or through the bathroom door...that kinda thing. just a little confidence booster with some "ready to answer questions" kind of backup!
good luck raydee...i hope it works for you!
jasmine