Just start with your own domain and use Wordpress as the CMS. It's not that hard. Don't even consider using Blogspot to host your new business idea.
I agree with the suggestions made here, start with a free BlogSpot subdomain and see if you like blogging and the basics behind it. Once you get a bit of experience and liking to it, get yourself a decent hosting service, and move to a self-hosted Wordpress. Having said that, there's people with extremely high authoritative BlogSpot blogs around too Regards M3rC
i have experince of blogger about 1 year but it seems that Google Adsense Pays less if we use blogger.. Right ?
Wow, is that so? I didn't know about this, only remember when I had a blogger account, google adsense accepted me directly... Hmm, I also have a blog in wordpress, but thinking to use bidvertiser, maybe google adsense is better?