Do I need to decide on the gynea now?

I’m torn between KKH (for their extensive equipment/staff) VS Mount E Novena (for comfort of a first time mom). I have yet to see any Gynea now for this reason. Or can I later switch along the way? Does anyone know if SGH (pref private) is any good? Also the myth of not telling anyone in the first trimester. Does that include like my yoga instructor? Thank you!