how to cut curly hair extensions

i am in need to get a major trim.my hair is so damaged to the stupid brazilian keratin treatment that i did.anyways i received wavy hair extensions from glamourextensions.it is one lenght.now if i layer my hair how do i incorporate the extensions to match.how do i talk to the stylist about it.do i go in using the hair extensions already attached to my hair and they cut it that way.i am embarrased to ask the stylist about hair extensions .because sometimes they know nothing about styling hair.especially with my experiences with them.dont you think i need to layer the wavy extensions to match my hair? thanx guys

do not do the brazilian keratin treatment.i did paid 300.00 dollars.the stylist told me that my hair would look damage free.and help with damage.well the first 4 days when you are not supposed to wash it looked fantastic.after i washed it the last 6 inches of my hair looked fried straggly etc.i swear my hair looks shorter and thinner.awful. therefore i am into hair extensions now.due ti thinning hair. i wear clip in.i cannot get the hairlocs because i am afraid of more damage to my hair.