I am not a big fan of using scripts, however there is one I can’t live without: The Override Script. It adds a button to your reviews so you can click on it whenever you failed a review and you don’t agree with the result. For example, if you mistype something you can use it and it’s as if you didn’t do the mistake.
You will also encounter a lot of vocabulary that you won’t necessarily need in everyday’s life(just there for practice) and the script can help you with that. There are some words that I will never use in my whole life, so whenever I struggle with them I ignore them(only a few exceptions).
I suggest you check this thread: Visual Guide on How To Install A Userscript
Bon courage, j’espère que t’es bon en français aussi. Le japonais c’est extrêmement dur!