Breast pump, handsfree or wired

Im a FTM and still not sure which breast pump to buy. is it necessary to have a wired pump and wearable pump both at the same time ? Im still stuck between wanting to buy spectra s9 or just buy wearable breast pump like babyexpress or youha. And if i were to buy handsfree wearable breastpump, can i just buy 1 side or best to buy for both sides? Any experienced mummies can advice? #advicepls #firsttimemom