Not to mention the whole “saving it for marriage as a gift to your spouse” thing seems like it would backfire. Sex really isn’t nearly as enjoyable when you are a total noob at it, especially after you made a big deal about it. “Woo here’s my gift to you honey, some short and likely disappointing sex.”
Just my thoughts on the matter. Not meaning to bash on your religion Ilya, I’m really not. If you think that not getting laid until you get married is worth it, more power to you. I’m not religious (family is jewish, sometime around my confirmation I decided it wasn’t a good fit for me, looked at other religions, read the books, didn’t like them either) so I have no problems with “sins” provided they are between consenting adults and/or are not hurting others.
Edit: I will give you credit on the fact that you really can’t go wrong with a lot of slavic women. My GF’s Ukrainian. I gathered the impression that there aren’t ugly women there. A lot of them are pretty batshit insane though.