Hey Omar,
If you feel comfortable controlling the kite and placing the board on your feet etc then I believe you will be fine to go it alone.
When I finished lessons I was up/down up/down and couldn't get more then 20m in one direction. I spent a few hours on my own and practiced in one direction only then one day it just clicked.
It was helpful that my instructor advised that on average it takes approx. 100 attempts at a water start to get the hang of it. So I eased off on the pressure and just did the best I could, whilst trying to think each time I was unsuccessful, what I was doing wrong.
Between a few weekends on the water solo and studying the Progression DVD and anything else on the web that I could find it just came together.
In saying all of the above, if for any reason you don't feel comfortable on your own or have any concern for safety etc then stick with the lessons.
Good luck with it