1. There is always fear - Its the truest statement that anyone can ever say. Putting yourself out in the world for everyone to see, being vulnerable with your craft is hard. Not everyone will give you the support you will need and want. Not everyone will like your style of writing. It's going to happen and the best thing you can do is jump in feet first and worry about the fear later.
2. Find yourself a community - I've been lucky enough to find a community of writers online that share my same goals and struggles. When that fear starts to settle into the back of my mind, gnawing at my self esteem and pushing its way into the front of my mind, I reach out to my community for support and words of encouragement. They've all been there. They know what I'm going through and they will help me through it.
3. Tools are just as important - Every writer knows that without a pen and paper, a thought will never become a story. You need the tools of the trade to help your business grow. I never leave home without my laptop, Dropbox to keep me attached to my writing anywhere I go, Tweetdeck so I can make sure my readers know that there is a new post on my blog even when I'm busy, and Invoice2go so I can send invoices to all my clients from my mobile phone. This last one is a big one because you want to get paid don't you? Invoice2go has all the services you need to keep track of your finances.
Freelancing is not going to be for everyone. I love being an author just as much, but to keep my skills sharp and well rounded I write as much as possible and so should you.