Expats are quite scattered on the island. Holland Village is quite popular as is Tanglin area & the East Coast. There is not really an 'English area' as such.
Your first decision about where to live you should consider where you work & how long you want to commute. If the job comes with a car then no real worries, if not you may want to live live an MRT (underground) station, or near a bus route. You may have children & proximity to the school may be a consideration.
After that you may want to think whether you want to live in a
condo (apartment block) that comes with a pool, tennis court, jacuzzi etc. Or would you prefer a house that comes with a garden?
I would suggest that, if you can afford it, spend a couple of weeks in a
Serviced Apartment so that you can explore & get a feel for the place & view some places before you decide.
Best of luck
"An intelligent man is sometimes forced to be drunk to spend time with his fools."
Hemingway