Good choices:
I don’t wear elbow or knee pads but may start with knee pads shortly. Most of time I don’t need them but on a recent spill banged knees on bike as I went down and it would have been nice to have some padding.
A lot of good brands of mtb gloves out there. I don’t care for padded palms but some prefer it. Light gloves are best.
I have a Giro helmet and recently borrowed a POC. My Giro helmet was way more comfortable. Going to stick with that brand and it is more affordable too.
I would suggest eyewear too. You don’t need some expensive specific pair. I use Pugs and they are cheap work well and fit well under my straps on my helmet.