dude i kinda have the opposite of your hair... mine is thick and a little wavy.but i think your dreads look great man. just let dreads be dreads. the tips will start to pull together in a few weeks/months. i tried to blunt mine, but they just fell right back out and look all whispy. so im just leaving mine like that too. as for the frizz on the top of your head, it will get better on its own and tangle up with the rest of the dread. but you will always have frizz. it wont be nearly as much but it will be there. just have patients and let nature's mysterious ways suprise you.