I can't add a font in power bi

[mariaerthall]

I tried to added the theme to use the font "montsserat" in my dashboards using json and didn't work. I did all the steps and still can't use the theme i added, it only appears in the "box text" of the "homepage" menu, but i can't use it in the graphics, can someone help me with that? I used the font from "google.fonts" and the code in json:

{

    "name": "Nova Fonte",

    "visualStyles":{

    "*":{

        "*":{

            "*":[

                    {"fontFamily":"Montsserat"}

                ]

            }

        }

    }

}
my steps:
1- i dowloaded the family font at google.fonts;
2- added the font file on my pc in the "fonts settings" in the "trueType" format;
3- i created the code in VsCode and saved it;
4- added the archive saved as ".json" in the "themes search" in PowerBI.
a message appears: "your custom report theme is ready to use"
and nothing happens.
And also, every time i want to use the font i have to add it again, idk if this is normal or shoud i just add it once and use it forever.
Pleeease i need help, i tried everything.