Ok I don't consider 4 yrs as being old, the I7 7th gen is a pretty good processor, and you should not have too many problems installing any mainline distribution, my suggestions would be MX-21, Mint [cinnamon is pretty but mate desktop is a little quicker]
Debian stable with non-free driver pack, any of the Ubuntu family [Kubuntu and Lubuntu being a little faster than the main build]
or if you fancy something a little different, Parrot home edition [not the hacking edition until you learn how Linux works]
Just download and test run them all "live from a USB, it will not be at full speed but will give you a chance to check all the hardware works and if you like the desktop offered on each one.
As we keep saying, the best Linux distribution for you, is the one you like the look and feel of, and the one that runs best on your kit.