youtube karaoke isn’t the best most tracks have the vocals low in background ,check out sing snap, I use a usb 4 channel mixer with built in FX so I can get a good mix on my sound and pal talk is a good place to hang out and sing
I don't understand a lot of what you said.
Can I go to a store and pick up a box of usb 4 channel mixer with mics?
Our Magic Sing system has a wire and a wireless with chips you can buy, but it is eating batteries and getting hot with a crackly wire connection.
We bought it old, used and four years ago.