A few questions before I dread
neglect is basically throwing the comb and brush away. Hair will naturally knot up and form dreads on it's own if not brushed or combed. It is the healthiest way to dread. All you have to do is pull the sections apart to keep it from being one big knot.
Back combing and twist and rip methods work well. But remember to be gentle if you use one of these methods.
with you having to brush your hair a couple of times a day..it sounds like your hair is begging to be dreaded.
Dreadlocks are not made by letting your hair be nasty and dirty.Oily, dirty hair does not dread easy. You want your hair to be clean. Clean hair makes healthy dreads.You can use shampoo on your hair but nothing that leaves residues.
Read the section on here called dreaducation. It has lots of information that will help you.
Good luck with whatever method you choose.