Durability is crucial for hairdressing scissors.
You'll not want to keep having to switch them they will break. You'll need to be assured that they're ready for action when in order to.
If you cut mens' hair you will need hair clippers as well. https://telegra.ph/Good-Tremendous-Grief-Theres-A-Long-Black-Hair-On-My-Face-That-Im-Blonde-08-23