I can definitely empathize with this topic. I bounced around from one job to another after high school before dropping into construction (met a guy at a church was was hiring of rhis company). Construction was the one field that my father asked me to never go into, and after 8 years doing it, I totally agree with him.
So I got myself some ejamuhcation and then started bugging everone who was hiring for anything related to IT. I got lucky with a small company who's owner enjoyed training new technicians.
After that I have been quite successful at finding new jobs when necessary. I attribute this to my job search behavior.
1. I can do anything with the proper training and some time. I don't lie in an interview, but I will grab any scrap of experience and make it fit into the holes they want filled.
2. Although I'm often shaking physically in and interview, Everything I do is intended to show confidence and calm. It is amazing how people can interpret calmness.
3. Look at the job you are applying for and grab experience from your life that fits the job requirements.
4. Don't agree to everything. People often respond well to being told 'no' occasionally.
Most of all, do the best you can, and don't put too much stock in random advice. Your value is not determined by your job or your bank account.