No problem, your English is great! And glad you're enjoying the game so far.
1. In a sense, whichever ending you like is "canon." In practical terms though, endings that dead-end the story obviously won't be carried on to the next game. That said, if by "canon" you mean "endings that carry through to the next chapter," both of the other two do! That's the point of the extra "Data Crystal" save system I'll be putting in: play through 1 with whatever outcome you prefer, transfer the file over to 2, and there will be consequences based on it (small at first, but growing.)
2. I have a SubscribeStar, which I think is still Russia friendly? Sorry if I've got that wrong. If you can use it, you can send me a tip through that once the game is out. Otherwise, you certainly have my blessing to pirate it if no payment method is available, though unfortunately that will mean missing updates. No plans for Steam for now though. Maybe eventually, but that would have to come a while after this is out, bugtested, expanded, and successful.
3. I'm nearing the end of the 2/3's mark. I expect to have some actual news out on it by the end of next month. Initial release should be early summer if all goes well.