Can someone please help me because the video on line tracking confuses me? Should I do the obstacle course then try to figure out line tracking ,or figure out line tracking first?

Normally when you are running a multi-stage course or program, it's best to break the coding down into smaller chunks. For instance, first focus on getting to the start of the line tracking segment, then focus on getting through the line tracking segment, then focus on what you want to do after that. Breaking it down into chunks like this make the entire process easier and makes more sense logically than trying to do the entire program in one swoop, especially if you are newer to programming.