Train Sound Design - Need Feedback

Heyo, so it's my first time making a proper game and the first time doing proper sound design, and I'm a bit struggling or just overthinking maybe? Need some feedback.

It's supposed to be an electric train which comes in, bringing cats to the island everyday. It's supposed to be a chill vibe, not too loud, everything has to be cozy.

I've trying using real train sounds(electric sounds are not easy to get :D) they didn't fit the theme at all and using real sounds for the train movement and slow down/speed up it just doesn't sync up to the movement well. Tried using generated chirp sounds also didn't sync up well.

Now I'm generating the sound wave based on the speed the train is moving which seems to work the best and mixing in the signal sounds.

Any feedback is it good, is it bad is greatly appreciated. Or maybe you have some suggestions on how to create the electric train sounds, or just suggestions about sound design in general. Thank you in advance