I don't think there's a Ukrainian language school left open in Crimea. If there is, it would be one or two. Basically, in the occupied territories in the east, there is also a policy of essentially forceful implementation of the Russian language. That area on the Ukrainian side is also a predominantly Russian-speaking area, but that's not to say that people don't speak Ukrainian there. I wouldn't say that it's safe to be a Ukrainian speaker in the occupied territories.
That is not true in government-controlled Ukraine. There are a dozen MPs who are going to be here. I'm sure that for some of them, their first language is Russian. If you watch any news footage of the Ukrainian soldiers, you'll see that a significant proportion of the Ukrainian military is Russian-speaking.
On one side you have the Ukrainian government taking a civic view of citizenship, of language rights, and of all these other things. On the other side is a targeted policy of the imposition of the Russian language and Russian culture and so forth.