The Fm (minor) barre chord is a challenge for many beginners. It’s always more challenging to press down with your barre finger at the first fret. I always suggest starting learning about barre chord on the 5th fret. There’s not so much tension on the strings here.
For this chord the biggest challenge will be getting clean sounding strings with your barre finger.
Persevere and you’ll get there.
Keep on playing.