A few alternatives to Duolingo (which hasn't been that good for a while now)
So here are some tips
Drops app - Originally from Estonia, now a Kahoot! company which is from Norway.
In few minutes a day for unpaid version it builds your vocabulary and you can also search by the topic. They offer wide range of languages.
They also support Ukraine.
Preply - Tutoring platform focused on languages originating in Ukraine. It is like a marketplace where tutors offer their language services and you can book tutor for language you want to learn.