Here are some optional tools that will make your life easier when modeling.
MC-META
This is a Blockbench plugin that lets you write mcmeta to textures.
To install this plugin, download the plugin here, and drag & drop onto Blockbench.
To write mcmeta to a texture, right-click a texture, then select Edit MCMeta
.
You will see a pop-up window with a text field. This text field will contain the entire json of the mcmeta file.