Without any direct experience of digital marketing?
I've name changed for this, just in case someone recognises me.
I am relatively good with computers - have my own blog, prolific on twitter/facebook etc and fairly savvy on digital trends. I am (without wishing to blow my own trumpet) a good writer and presenter.
My background isn't directly in marketing but I was involved with those departments to some extent when I was with a big corporate.
As my children are still very small, my main focus at the moment is to work part time, I thought I would set up in business offering my services to local businesses at first. Explaining how social media works and how they can set up their own blog, twitter feeds etc and also offer to manage these for them if they don't feel they have the time or the know-how.
My main fear is that it's actually much more complicated than I think it is and I'll be ousted as a fraud the minute I try to sell myself 
Do you think I can do it or do I need some further training/qualifications etc.
Do you think there is a market for this?
Any advice people doing it already can give me would be great.