Very beautifully read! You have an accent but it doesn't impede communication at all. If I were to advise you, there are two points to look at. The first is - the room's only window. You roll 'room's only' together so it sounds like "a window only for rooms' such as in 'men-only room' - a room only for men or 'entrance for European citizens only' - an entrance only for Europeans rather than 'the room's only-window'. The second is a rather soft T such as in sit up. I would pronunce it more forcefully BUT it is not uncommon to have a very soft 'swallowed' T. Australians and Americans are very likely to pronunce it this way. Ultimately, I think you have absolutely nothing to worry about. Your have a fine reading voice and indeed, if you were to narrate a talking book, I think people would find your voice very attractive and easy to listen to.

No, no, no, not at all. If you didn't say your native language, I'd never guess you're Russian! Perfect accent, in my opinion.