They have put a lot of time and energy into preparing for their profession and want to use all their skills well. If you have questions raise your hand in class and ask away. You may feel other students will look down on you for not knowing the answer to such a dumb question but what they really feel is gratitude that someone has the courage to ask what they desperately needed to know and were to afraid to do so. Teachers like to have you ask questions about the course material because it gives them some idea about where the students are in the learning process. And don't be afraid to consult with your teachers if you have problems or some special need.
Teachers post office hours on their doors just for that purpose.
You might have to learn to be more assertive as one of your goals in your education. There is another aid that will have all of the other services listed and explained. Because it provides so much information it is not appropriate to reproduce it here. But this publication has a wealth of information with which you should become familiar. You are strongly encouraged to become familiar with this important student aid.