For a consistent online presence, you can use the same name for your blog and website. Just confirm that name is not trademarked, to avoid the legal problems. Then secure the domain name for yourself. This will enhances the identity of your brand.
You only need to register for GST if you are earning more than 20 lakh rupees. Since you are making less money than 20 lakhs, you do not need to register for GST.
