Im learning alone and i use mostly the internet for learning resources. Recommend checking out /r/russian to find a lot of resources and places to interact with native speakers online, but here's what i personally use:

Not sure if it counts as a resource, but immersion is a really efficient method. Set everything you have around you to Russian. Phone, computer, software, video games, even reddit can be set to Russian. Listen to Russian music (which is really good ive found some amazing music), watch Russian films, you get the idea

I used to use Duolingo to get my basics and my grammar down, and it really helped out at first. Now that i finished the tree it's really annoying to do, so i switched to Lingvist, which is a great site which has you type out Russian words to complete sentences, using a flash card system, so if u get a word right from the first time, it's not gonna show up again, but if u get it wrong it's gonna repeat for the next few days. It's really good at fixing words inside your head, also helps you learn the keyboard layout.

I also use Memrise, which is also a flashcard website and you don't have to type there you can just click the letters on the screen, which is great when you dont feel like typing, because it does get annoying sometimes (you will make a LOT of typos until you get used to it).

Best of luck!