OK Blog Geniuses I have Questions!

I have really enjoyed blogging. It's something that comes pretty easy to me. Sometimes I ramble on about things you care about, other times maybe not so much. My blog is a bunch of things really. It's what's on my mind today. It's what happened to me today. It's what happened to me last year. I think my whole life could be a book honestly, but then couldn't everyone's? I like sitting down and just writing it all out. I think I started off slow but now it's become more. So, I want to be serious. There is a ton I do not understand. First of all, what is the nofollow and dofollow stuff? Is it good or bad? I have no idea. I am thinking I should get my own domain name. I can do that right here through blogger for $10 but is it worth it? Should I do it somewhere else? My biggest question is if I do I will lose all the widgets I have up...some of which are kind of important. I could write down every single code I suppose and repost them in a new blog. Oh how complicated it seems! I don't think I could create a good blog layout on my own. Writing is more my thing, not designing a layout properly. I think there are people out there who do that sort of thing though. So...I need tips, hints and all of that stuff from those who know what they are talking about. If you have experience tell me. I am working on getting more traffic and have been proud of my efforts. I am running out of ideas there too though. It feels like I have done it all. I am sure there is more. So those experienced bloggers and technical pros, I am asking for advice. I appreciate any tips in advance. I will look into each one. I search and browse the web for things but a lot of it is confusing to me. I am not sure which way to go. I'm sure others out there have wondered all the same things. I see blogs with 20 to 30 comments on each post. That would sure be nice. Someday. I can see it in my future. haha