use the over hand knots....one on each side alternating up the string.
then run a double over hand not at the end to finish. (not a square knot, but instead of once, go twice around then pull tight. Trim the tag ends I like to leave 1/8 or more (long is good)
Now burn the tag ends and rub them down so it melts into the knot. To short and you wont be able to melt them down enough to hold things together till you decide to glue it down. This will hold it together long enough for you to figure out where it needs to be...
THEN glue it down. If you want.
I dont have to glue my nocks. I trim more like 1/4" tags and melt them down into the nock, works very well and have found I dont have to glue at all.
Some of the adjusting is how tight you pull your half hitches. I prefer regular ole serving material not the fancy smancy stuff (not the plastic either, I forget who makes it) Nylon?. if I pull each knot TOO tight I cant twist up or down...if it's too loose it'll slide all over on ya.