4. You have to install the proper kobo firmware for your kobo model before install the kobo patches, please note that the firmware must be the specific firmware for your kobo model, and the version number of the firmware must the same with the patch version number
Download firmware from
https://pgaskin.net/KoboStuff/kobofirmware.html
5. you have to edit the files inside src folder, which will enable features inside patch, "Freedom to advanced fonts control" is one of the features, you have to read the files carefully and choose what feature you need, and enable them.
6. If you use Mac, use kobopatch.sh like Linux, I don't have Mac and never use patches inside my Linux, so I'm not sure whether you have to open the kobopatch.sh file inside a terminal or not.