hi i've never tried human hair but i do believe it can be very difficult to work with, i've not heard what people have found that works. Sorry i can't be of any help, hopefully someone else will know
Yes, I would also say to try a crown needle. Human hair, contrary to popular notion, is actually more coarse than mohair so it makes it more difficult to root. Also, you have to root it close to the root shaft or bottom of the hair. It has a "grain" if you will, and must be rooted a certain way to look nice and minimize breakage. Hope this helps