Work on the project as you outlined it in the proposal, and try to hold to the schedule that you put in your proposal. It takes discipline to do an independent project, so work closely with your project advisor in the process. If you find that your project is not doable as you had outlined it in your proposal, that is not a disaster. Research often ends up going in a different direction than you expect. You should not need to submit a revised proposal if your project veers in a different direction as long as your project advisor agrees with the new approach.