AUGUSTA — Jacquie Guerin is well-acquainted with the challenges of aging. She left a good-paying job in information technology to take care of her mother, who died at the end of 2014 after struggling with Alzheimer’s disease. When Guerin, who is 58 and now lives in Sanford, was trying to re-enter the workforce, she worried that her computer skills hadn’t kept up with the demands of the field, and that she would have trouble entering a new industry. “I was scared to start over again,” she said Wednesday morning.