Hello riani and welcome.
If you have read and practiced all of your basics to the point that you think you would like to move on, I would suggest that you just write out a simple protection spell.
They are usually the best to start with. Also, if you wish to join a coven, just go to the "groups" tab above and look through the list of covens here and choose one which you believe suits you best. Then just do the application.
The best of luck to you on your journey.