Anyone here good at marketing, brand managing, social media etc.?

Possibly. Would you care to elaborate?

What is your brand name? What is your brand? Who is your target audience? What will you be doing (blogging? selling physical products? developing an online presence? building an audience/online community?)?

Tips: about 5 words long or less for the name; have a tagline that tells the audience whether the brand is for them; be catchy but informative.