I need help with the font in my website in odoo14, i want to change the font of specific titles and i don't know how...

I know that i have to change the html of the actual page, but, i don't know how to specify the font that i want, because i have it in my computer. it's a ttf document (actually, there're two fonts that i want to use in specific tittles and words in my page ). Please somebody help me.

I tried to change the style in the h1 of the html, but it doesn't work because i want to use the fonts that i have downloaded.

Thanks ♥ i will apreciate the help ♥