Now here is an instance of where the language gets in the way. The word mechanics brings to mind people in matching pants and shirts with a name over the pocket and a box of tools. That is not the kind of mechanics we are talking about here. Physics, and all branches of science, must use words to convey information. The words used in the sciences come from the common language and have precise meanings, usually related to the common usage.
Mechanics is the study of moving objects.
For now we will deal with classical mechanics which deals with objects moving slowly relative to the velocity of light and objects large relative to the size of atoms and molecules. The reason for starting with mechanics is that many of the basic principles we will learn there apply to other topics. There is another aspect of the language of science which we are going to have to come to grips with. That is mathematics. We are going to assume for the most part that you took and understood the college prep high school math courses.