@Scaledish,
This is the thread you need.
The download in Step 2 is the kobopatch pack. Download, unzip and look at the contents. The kobopatch src subdirectory contains the .yaml files containing all the patches. Each patch has its own help notes.
The kobopatch.yaml file in the pack's root directory can be used as 'Mission Control', listing all your patches. Some people (e.g. me) prefer to only list the patches they want to be enabled. Others prefer to have all available patches listed in there with either yes or no against each patch. I don't have one of these but maybe someone else will post one for you.
To be honest, if you've never used an unpatched Kobo before, it can be difficult to anticipate which patches you'll want to enable. Maybe you should just read a couple of books before deciding what drives you nuts in the stock firmware
Some patches are for epub only and some are for kepub only, so kepub vs. epub is one of the early decisions you need to make. Both have their pluses/minuses. Try both.