The Udacity ML course is gradual enough to avoid overwhelming you, but really in-depth: https://www.udacity.com/course/machine-learning--ud262
Definitely recommend that as a good starting point. Isbell and Littman can be a bit cheesy at points, but they're very clear and thorough.
Edit: I should mention that the class mainly focuses on neural networks and image recognition. However, once you have the foundation, you can apply your skillset to a vast range of applications.