What if you also only know how to code in scratch like me (help), but want to add a saving system for people to come back to your game later?
Well, there are two methods.
1 - Use PenguinMod (REALLY good scratch mod but the servers are down so use the compiler) and use the extensions such as JSON or Files (blue code stack button at the bottom left)
2 - Follow Griffpatch's "Save My Game!" tutorial
I used 2 for my game since it was on regular scratch, but in general, PenguinMod is better because among other amazing things such as W.I.P 3d support, you can outright run javascript directly in the editor if you wish to.
(edited to fix grammar)