SOME1 PLZ HELP WITH MATH

Hello I need urgent help. I have an important math test in 20 days and if I fail the test it means that I will be forced to start the entire math course all over again :( which means that I will be pulled back a year and have to redo everything. 

We’re currently going through areas such as volume, area, factorization, and coordinates. And I struggle with most of it :.) 

If any kind soul would help me I would be eternally grateful and owe you the rest of my life. Any help is good, any webiste, youtube channel or just positive words helps me a load.

If any wonderful person feels kind enough to help me personally I would also be eternally grateful ( like facetime or call ) I have some socials where that would be possible that I could share if needed :)

I’m sixteen but this feels like the most important test of my life and I’m really anxious about it. ANY TYPE OF SUPPORT HELPS!!!!!!!!