Adding a shortcut to a site on the desktop is pretty easy. To do this, start the browser, open the desired page, then you need to click three dots in the taskbar, in Yandex they are in the lower right corner, in Google in the upper right. Other browsers must be in one of these places too. When you click, you should see a drop-down list, or a menu sub-item, there you select the format button "add to the main screen" or "add shortcut". Everything.
If we are talking about a standard Android browser, then you can do this by clicking "Menu" -> "Add link", this should of course be done by first opening the page you want to add.
In the Yandex browser, I can tell you, click on three dots in the lower right corner, then add a shortcut, that's all, but in the rest, unfortunately, I can't say.