The way that I learned how to blindfold solving was like this.
I first understood how it worked, this is very integral with the whole learning process and it greatly speeds up your execution as you know exactly what you should or shouldn't be doing.
Then I worked my way up to an actual solve. I first tackled the issue of execution first and wrote down all of my cycles on a piece of paper. I then placed the cube out of sight, usually below my table, and worked off of the piece of paper and tried to close my eyes as I did it and visualize the cube.
After a few successful solves, I knew I was ready to try doing it with memory, and so the next step was then to learn some memorization techniques. This for me was the most fun part, although it took a while.
Just experiment and really learn how to do the different steps thoroughly and understand how and why each part works.
-Franklin