How to change the font in the header of a WordPress site?

Question

Fonts

Hello. Now I'm going to ask a possibly stupid question, but I'm not an expert, so don't judge too harshly.
I downloaded the theme "Asteria" light version for Wordpress, and it became necessary to change the font of the site title. In the settings of the theme itself, it is possible to select a font from a ready-made list (as I understand it, fonts are loaded from Google webfonts), but the font I need is not there. I uploaded the desired font to the hosting and tried to connect it via Css, but it didn't work out. Rather, the font was connected, I added it to arbitrary text and the font changed, but the font in the title does not change. What to do in this case?

Answer 1

<div class="logo">
    <h1>Site title</h1>
</div>

.logo h1 {
    font-family: "My custom font", arial, sans-serif !important;
}