Hi Fayna,
If possible, please choose dual breast pump instead of single breast pump so that you could save time. The breast pump choice also depends whether you want to use it at homes (bulkier) or at work(portable) ones on top of your budget.
You could consider Medela Freestyle (portable ones) or Medela Pump In style (bulkier ones). The Medela PIS can pump faster than Medela Freestyle however it is bulky and thus more suitable for home's use.
If you are on budget, you could consider the Korean brand, Spectra... Spectra S1 (home's usage) or Spectra M1 (office's usage). Hope this helps.