How to create a language and layout?

Question

Fonts

Greetings. I need to create a runic TTF or OTF font that goes from right to left. How can I do that? I have already downloaded several programs, but have not figured out how to send the text. All the time some kind of heresy is obtained.
I would like the font to immediately present the generally accepted Latin and Cyrillic alphabet, so that users do not bother when switching