What do I have to do differently?

Hi all!

This pilea is a propagation from a friend's mother plant! I got her in may last year so this is the growth of roughly 10 months.

We've had a rough few months at the start until we (my mother and I) noticed my bedroom wasn't the ideal space (idk if it's the warmth, the sunlight, the air). Since we put her in the living room she's been doing so much better.
She sits at the window still so is getting a lot of natural light, watered 1-2 a week with I think 400ml of lukewarm water. Every now and again she gets coffee filtered water for the nutrients.

There's also currently 6 pups.

All in all I think she's doing well, but I'm wondering if there's something I should he doing differently or could be doing better. A few leaves slightly browned or have little tears. I'm also wondering if the growth horizontally is stunted.

I don't really have a green thumb and my succulents in the past had to move on to greener pastures, but this was a birthday gift from a good friend so I'm determined to make the most of it!!
I'd appreciate any feedback!