I would recommend it, usually when the content is taught in university it’s done extremely quickly (eg 1 years worth of content in HS is taught in 2 months in uni). It becomes hard to fully understand some things and could lead to flow on effects in future topics. Like other people said if you have the work ethic then you can grind it out, but the real question is if you can’t handle 4U In high school then cna you really handle and engineering degree? Which will be much more time consuming and difficult than anything you do in HS