Making a template is really quite easy to do, no matter what shape you want to do.
There are many videos on you tube that will help, and of course you can ask any questions here for assistance.
Southern guy is correct, you paid for the system so it is rightfully yours to take!
It never ceases to amaze me the underhand tactics of Hair salons that charge way over the top prices for, the majority of cases, low quality hair systems!
Slowly, very slowly at times it seems, the information is getting out there that this game doesn't require pots of cash for good quality systems or the expensive tie ins involved regarding maintenance etc..
Welcome to the world of DIY hair wearing it will be a journey you will not regret!