Medela is the best but expensive, if you only need it for 2-3 months, see if you can find a second hand one of cheaper price
Avent manual pump is also very good, too but sometimes you may feel 手軟 after pumping for a certain time
I have both pigeon electric and manual milk pumps, if you want one, I can offer a cheaper price to you, please pm me for more details. But honestly, pigeon manual pump is not very good, I suggest you to use the electric one
Please don't give up : ) Mama milk is very good for BB