It is possible to leave, but it is very difficult. As for buses through Crimea, the asking price is $ 400-600 very often if there are no familiar drivers. In addition, documents can be confiscated from you in Crimea if Russian soldiers do not like you. And then you will not be able to go somewhere safely
Another option is to go by car to Ukraine immediately. You can find those who are trying to leave and take you as a passenger. However, there are many inspections along the way that may not be released. My friend and parents tried to drive three times in their own car on different routes and it didn't work out. I'm not trying to leave at all, I'm just waiting for us to be released