This is a great post by Jennifer Oldham on the site Quiet Revolution (a FANTASTIC resource for introverts) about her experience returning to gardening after several years, and allowing herself to take risks in her garden, giving herself practice and permission to take risks in life too.
My quest for a garden started in the winter when I asked my husband to build me some raised garden beds. He surprised me on my birthday by spending the day building three-tiered, raised beds for me. I was thrilled.
In my previous gardening life, woodland creatures had eaten a part of my harvest before my family and I had gotten a chance to pick my vegetables. I felt cheated and disappointed by the discovery and I was determined that this time would be different.
Read the entire (short!) post.