umm... I'm actually not really the best, but when it comes to make good looking spells i could lend you a hand i guess. Do you have any specific request or are you asking me to generally explain it, because if its the second, i can only suggest you to go through some tutorial on this site or, well, as stupid it may sound, learning by doing
Another thing i could offer you, you may ask me to make some kind of spell, then i send it to you and you can try to learn from my example or ask if you dont understand certain things, i hope this might help you