If you can't solder, and are happy copying disks. Buy this:
https://www.ebay.co.uk/itm/Team-Xec...049834&hash=item2a9d2c0691:g:kiwAAOSwg31aWpmc
This will allow you to hack your dvd drive using a laptop instead of buying a via card etc and an old desktop.
This allows official ISOS to be burnt to disc and played. They have to be from a genuine disc (signed) and burnt correctly for them to work.
If you can solder. Buy this:
https://www.ebay.co.uk/itm/X360-ACE...255062?hash=item2843818b16:g:BrkAAOSwRTVaT5ot
This allows full unsigned code. custom dashboards, free games, dlc, xbla games etc. Loads of tutorials online to follow. You will need soldering iron and a few other pieces but this'll be the cheapest method and best.