Kim's advise is good. It's true that we have a tendency of wanting to have more blogs, but even though, I think 20 is a little too many.
That can only be done by automated softwares, I have one of my students who did that but now has given up, it just didn't work, it was slowing down his servers resulting in no traffic due to slow loading or unloading blogs.
He had wanted to do it for adsense, my advise will be to cut down on the number of your blogs too, one should be okay for starters. There is a lot of good feedback here if you use it.
Don't forget traffic is every marketer's cry, it seems hard but it's not really that hard if you do what's required, it takes some focus.
Anyways, it's a learning curve, you will get there, you are doing the right thing bu being here, just don't give up.