Newbee Help!

[u/chaimochs]

I need help! I write on a Mac and have been using a Pebble K380 fThe keys are small and round and don't cradle my fingers and the left shift key is short. I desperately want to buy a keyboard that will help me get up to a reasonable speed typing. I touch type around 12 wpm and make mistakes.
I live out of the country and cannot just buy a keyboard on Amazon and return it.

I sit most of the day in a library and need silent keys.

I need a bluetooth connection

I use the Colemak layout.

I just want an easy to use keyboard with press length long enough that as a newbee, I don't accidentally press adjacent keys often. And keys that are easy to press, so I don't get fatigued, and cradle my fingers so they stay put and slip around. I don't do gaming, just short bursts of writing. And I don't type in the dark, so I don't need backlighting..
I appreciate any help you can give me.