How to change font size and font style in Wordpress manually?

Question

css

Hello!
There is a finished page in Wordpress made through the "Shapely" theme.
I want to change the font size in some blocks, because it is too small and the font itself, since Russian is not supported and is set to default, does not look very good.
How can this be done?)
Perhaps the question is stupid, but I just started getting acquainted with WP, I didn’t really find anything on the Internet, mostly advice on editing the theme itself, and not specifically the finished information on the site, or some plugins that change the size under Pages -> Edit.
Is it possible to change it in the same way as changing the page in the browser (select the text, click to view the code and edit the html).
That is, you can also find the phrase in the code and manually enter the desired size for it. And in conclusion, how to change the font style itself, how to connect a new one?
Perhaps, somehow through styles. The task is to connect a non-standard font. Thanks in advance and have a nice day!

Answer 1

Гуглим font-face - это подключение шрифтов
Размеры шрифтов и сами шрифты меняются в Css файлах или в случае вп, в шапке сайта