When you start programming your first web app you are doing something that you have never done before. It's a new challenge, and a new opportunity.
Patience, therefore, is going to be very helpful. Patience, not only with the process but also patience with yourself while you take on this challenge.
Remember that this is a totally new process for you. It is ok to ask for help if you need it.
Do not rush through your courses. Slow down and make sure you fully understand the course material before moving on.