Everyone is afraid to try something new at first. But don't worry you have learned so much till now and have excelled in your course too. Take baby steps one step after another and don't think about how long you have to go, instead just the next step. Initially, you might do some goof ups but dearest that's like a stepping stone when you look back later on because that's going to tell you what all to keep in mind and not to do. After all experience is the best teacher and if you want a good teacher like experience you gotta go to the school of work. Keep your best foot forward and start the work. Three months from now you will comment here saying you did awesomely! Good luck