Learn polish instead of russian! :) We have simply alphabet and we read everything exactly as it's look like! Find an interesting polish tv series or a foreign one with polish subtitles or voice over. It could be extremly difficult for you to learn slavic grammar because it's crazy, even we, polish people, have big problem with it.   If you need some help, let me know :)

Russian is an intriquit language but when the patterns of the grammar and language structure are learned it becomes whole. Search for "A Basic Modern Russian Grammar" under PDFs. It is a good start to the grammar side. These slavic languages share so much but without mastering the basics simple things such as mistaking the "g" in Russian, г, as the letter "h" in Ukrainian (also г) will happen. 

may be try find help on this site?) i learn french by youtube, and if need practique here many russian who can help)

Get books in those languages, watch tv shows and movies in those languages, Duolingo to help with basics, I am currently teaching myself how to speak Russian too!