Hello all, I am new to this site and sorry don't mean to hijack this thread but as a newbie it shows I have to make 10 posts before I can create a thread of my own so please let me ask my questions here?

if ok, I have been blogging sporadically but never thought of monetizing until now. Doing lots of research on the net finding lots of info but nothing covering my immediate issue. There are the main niches I can blog about:

Health [Skin problems, Arthritis, Diet]
Mental health
Computer repair

Plus I could add web design and Marketing. First issue is coming up with a domain name to cover all of those niches, any advice please?