My simple advice to if you are a qualified professional
Take the plunge and build your off-line face to face sales skills for professional services straight on through sheer determination and will to succeed being prepared to learn and adapt along the way.
Marketing and intuituively understanding your market is as well as pricing to them can mostly best learned through your own experience face to face and by phone.Then you will best understand how to synergize online with offline for max effect.
Then you can bring it on line. Hiding behind the internet mostly never works.
Regards
Wibble, bark, my old man's a mushroom etc...
(4 days only!)