You first need to create a dynamic font from another type of font file (
.otf, you can google for these kinds of fonts)
In Godot, click on the "Create a new resource" button in the top-right corner:
Search for and select "Dynamic font", and click "Create"
This will open your new font in the inspector. Click on "Font", and it will show you an area (
Font Data) where you can load in your
Be sure to click the "Object Properties" button, which gives you the option to save your font to a file.
On your label, if you scroll down in the Inspector, there is a section for
Custom Font. Expand this section, and you should be able to select your new Dynamic Font that you just created.