Self education help

I attended vocational school for two years learning software development, passed with flying colors and attempted to jump right into the field. After 6 months of applying and not even a call back to show for it and i had to settle for a full-time minimum wage job and im trying to get back into the field. Are there any reputable free self education tools available for software development? Also are there any good freelance websites that would look good on a resumé if i got experienced with them? Thank you