Is it okay with the rules and regulation of Fiverr if I add Link of my blog exclusively for Fiverr in the “About me”?
Probably not since people could contact you through your blog right? Any outside contact with potential buyer is against TOS. You can however confirm wit CS.
Yes there are a few sites where you are allowed to do this such as blogger.com.
Get the list of sites you can use for this from customer support.
no, a blog exclusively for fiverr. In that blog one can tell about him even in more detail than in about me section. About me section is very short you now.