GED Math Help

Right now I am preparing for my GED exams. The only area I still need help with is the mathematics. Specifically quadratic equations, systems of equations and the like. I somewhat understood from the videos in 8th grade math on these topics but I still get a blank mind the moment I look at questions. I don’t know how to approach these topics independently. Is there anyone who could answer my specific questions where I am confused? I would love it if I could chat with one of the instructors and have my questions explained directly. The material as presented does not allow me to interject and have something clarified. I have to wait a long time for an answer and often don’t find the answers posted by other learners helpful. Please help!