Very easy if you have a strong calculus background. Methods are relatively simple and formula-based, and material is pretty useful in other classes like PDE or upper-lever physics.

Learn methods of solving ordinary differential equations including separation of variables and Laplace transforms, with some applications (mostly physics)

Professor was laid-back, funny but clearly knowledgeable. Posted lectures online and helped with homework problems during class. Only drawback was slow grading

Take some time to review calculus 2, especially things like integration by parts and partial fraction decomposition