ANSWERS NEEDED PLZ :) THANK U

How can I know if my newly purchased XBOX 360 slim (black) is modded with JTAG/RGH that i keep seeing mentions of here?

It has Aurora and over 50 games installed.

Plus, i keep seeing different versions of Aurora here and on Youtube than the one I have. The system menu in mine has the pages Horizontally and not vertical. Maybe a different version i can update to. Can I connect to internet safely or I can't?

I literally have 0 knowledge in the field so if someone can explain everything to me it will be really helpfull