I have clip in extensions as well and have beaute speciale booked. I have gotten my hair done locally where I live for a friends wedding and that salon put them in for me, however i can put them in myself as I used to be a stylist. What you will need them to do is tease your hair just a tiny bit where the clip will go. If you are planning on leaving your hair down and curling tge extensions... You will want them to curl your hair and the extensions together and clip the curl all curled up and let them cool and set for about 15 mins...
Hope that helps a little.