I am 46 and am in a desperate need of a career change. My first career was auto mechanic, mid twenties I switched to construction. I was somewhat hampered in choice of what I did because of being a lone wolf type that didn't function well in highly structured large organizations and leaving home at 16 with a 9th grade education. A+ in algebra Currently I am a self employed home remodeler, I have hated the sheer boredom of it for years but stayed with it for a variety of reasons including the ability to make a decent living. The great recession destroyed construction and now I have no choice but to find a new career. So I have spent a considerable amount of time looking at my options and it seems if I learned CAD I might find some work in spite of no formal education. My long term goal is self employed low volume some sort of manufacturing. I just figured out I could download a free trial version of it, I have 30 days to see if I can make some sense of it. Where do I start? Any good free online tutorials? What the learning curve on this like? Are there other things I need to learn first? Keep in mind I bought my first computer less then 3 years ago. You laughing yet? Yeah me too. Any words of wisdom, ideas or help would be greatly appreciated .