फ़ील लेना

It is grammatically consistent with Hindi's compound verb structure, but it is not 'standard' Hindi because it uses an English loanword. It is considered slang.

Technically yes, but in modern slang, it almost always refers to emotional or atmospheric immersion. For physical touch, 'chhookar dekhna' is better.

They are 99% interchangeable. 'Vibe lena' is slightly more modern and popular on social media.

No, it's not rude, but it is very casual. Using it with a superior might seem too relaxed or disrespectful of the professional setting.

You would say 'मुझे फ़ील नहीं आ रही' (Feel nahi aa rahi). You wouldn't usually say 'मैं फ़ील नहीं ले रहा'.

Yes! 'फिल्म की फ़ील लेना' means to get deeply involved in the story and emotions of the movie.

In this slang, it's often treated as feminine (e.g., 'अच्छी फ़ील'), but many speakers treat it as masculine. Both are generally accepted in casual speech.

In Hindi, 'lena' is often used to form compound verbs that imply an action done for one's own benefit or experience.

Yes, if you are 'immersing' yourself in a sad song or a melancholic mood. 'दुःख की फ़ील लेना' is possible but less common than happy contexts.

There isn't a direct slang opposite, but 'डिस्ट्रैक्ट होना' (to be distracted) or 'मज़ा किरकिरा होना' (fun being spoiled) are related concepts.