Is she spayed? This will make a big difference as to how you groom her.
Ebony my solid black, I originally hand stripped until she was spayed and then moved onto thinning scissors. Unfortunately I now have to clip her as she just gets too woolly. The coat King doesn't remove much of her hair now.
If you don't want to take her to a groomers have a look around your area to see if any of the colleges who teach dog grooming offer one off days when pet owners can take their dog and learn how to groom.
To be honest when I first started to groom my OH would only take them out in the dark
Two things to remember, take things slowly and take a little off at a time and secondly it will grow back.
To do her head, brush the top knot forward and against the lie of her hair make a cut and the using a slicker brush, brush the hair to remove the cut hair. Keep repeating until you have the desired cut.