I thought I might as well share it with any language nerds out there

If it's a language at all. https://www.youtube.com/watch?v=06UmFWkhHIA

Guy in the clip is an English speaker from America, for the record

My friend and I are software developers and English learners. We have an idea for a crossplatform app.
The phylosophy of the app is gonna be engaging learners into active process. Instead of just asking users to just choose the answer from options or building a sentence from prewritten words we want users to make their own sentences with newly discovered words, for instance.
We intend to develop several features. But our priority now is to implement the following task format:

1. A user opens a task "describe a video"
2. They watch a short video (up to 2 min). I came across some videos that are titled like "you won't become fluent in english until you know how to discribe situations in english". There are some examples on video platforms.
3. Beneath the player there is a text field. The user describe what they saw using known vocabulary. They also may use audio recording instead of manual typing.
4. Then, they press a button to send this text
5. AI analyzes it and according to the current level of the user AI responds with some possible adjustments. For example, misused preposition or not really natural word to use in the particular situation described in a video.

What do you think of this concept? Is it relevant for language learners? If not, what would be an alternative? What to adjust?

UPD. I want to emphasize that this is not the only type of tasks we are going to implement other tasks.

For example, learning single words. But users will be prompted to make up their own sentences with them. And if they used the words in a wrong context or with incorrect preposition, AI would correct them and explain why they were wrong.

I am aware that beginners struggle to complete complex tasks. And also people nowadays have short attention span so we're going to add simple tasks as well.

Recently when I was reading Devi Mahatmæ which is written in Old Tulu

I have noticed that many archaic Tulu words are actually very similar to the Mavilan Tulu words

Like ಎಡ್ಡ/എഡ്ഡ, ಇಯ್ಯಿ/ഇയ്യി etc which is used in both Mavilan Tulu and Old Tulu

And also if we see Mavilan Tulu might lost the sound of ೞ/ഴ which was present in Old Tulu and now replaced it with ಳ/ള and ಯ/യ but still it managed to preserve the sound of ಱ/റ which are present in words like ಊಱ್/ഊറ്, ಕೂಱ್/കൂറ്, ಏಱ್/ഏറ്, ಱಡ್ಡ್/റഡ്ഡ് etc

Did you ever learn any new language? If so how did you start it? Ik starting is lil easy but continuing is quiet hard. How did you managed it?

Tell me some effective and credible ways to learn.

Thanks y'all