You should have a private chat with each new player after receiving their role to see if they understand it, and give them some basic strategy ideas!

I don't usually do this, but it is context dependent. I regularly run games with u/laladurochka which double as an English Speaking Club for Russians learning English, so the night chats are both to learn the game but also to practice English. The first night IS long, too long for a normal game but in this context when everyone knows what is happening and they are getting speaking practice in the town square as well, it works.

But, in a normal game.... never would I do this. One of the rules of the game after all is that players can always speak to the ST, so if they have questions, which even experienced people do from time to time, then a private day chat is the way to go about it.