Here are some of the resources which can be useful for your learning. Some of these will be links to websites or Youtube videos or channels.
Brightstorm is a company that makes educational videos. There is material appropriate to university level courses and also high school level courses. This Youtube link has links to many useful tutorial videos, channels, playlists, etc. in many different subjects. I recommend searching through the playlists and channels because that will filter the videos by subject. The most relevant ones to this course will be:
pre-Algebra
pre-Calculus
Trigonometry
Geometry
I do not own any of the content of these websites.
Khan Academy is a well-known platform for educational videos about thousands of topics. This link takes you to their Youtube site. From there, you can access playlists, channels, or individual videos about Math. The channels that are probably most relevant to you are:
In addition, here is the link to the actual Khan Academy website (not the Youtube channel).
I do not own the content of any of these websites
Learn Math Tutorials is another Youtube channel which has whole units of math education bunched together. You can follow a sequence of several videos to learn in depth about a topic.
For example, there is a whole Playlist called intermediate math which has 66 videos and examples that go through several years of math curriculum.
Videos 1-7 are about: whole numbers, natural numbers, rational numbers, integers, etc.
Videos 16-25 are about: polynomial expressions, exponents, operations like squared and square root, etc. and equations.
Videos 55-66 are about: the coordinate plane, plotting points, the equation of a line in slope-intercept form and Standard Form, and how to rearrange the 2 forms.