You may find the worked examples in the following video helpful for getting started with integration, i.e., finding antiderivatives:

This is from a YouTube math channel I like, called PatrickJMT. You can find his playlist for integral calculus here. We will be covering most of those topics this semester, so you may want to revisit that playlist over the course of the semester.

If you prefer Khan Academy, see these videos in their calculus course.