YouTube. For Russian, 'Russian with Nastya,' is the best channel, in my opinion. She has hundreds of hours of lessons, and they are very simple and effective. Watch 20-60 minutes a day for several months and you'll get the hang of it. For Ukrainian, 'Let's Learn Ukrainian' and 'VERBA' channels are pretty good. Generally, there is much less content for Ukrainian learning than for Russian. DeepL or Google Translate with text-to-voice is great for learning new vocabulary, stress placement, and seeing grammatical structures. It isn't always perfect, but it's good for basic things. DeepL is quite good at idiomatic translations, phrases, etc. Ukrainian text- to- voice is only available in Google Translate, or at least I couldn't figure it out in DeepL. Wiktionary is good for studying root words. Good luck!

Thank you !!

Ok

I think duolingo