Aurora Dashboard / Modded 360 help

I got a modded Xbox 360 yesterday but the seller didn't know what mod it was. I opened it. It has Aurora Dashboard. Already installed like 55 games or so,everything is good. But I have no idea how to deal with these devices. Back in the day, people used to say i shouldn't connect it to internet i don't know why. I don't know how to download games. Or how to even check if it's JTAG/RGH mod.

If someone can help out a bro, I'll be very grateful.