Improve download speed in basement

when I was on copper coax we had a tech first run a 50ft ethernet cable to a wifi booster from top third floor, down past the middle floor u walk in from the street, and halfway down (1 of 2) flights of stairs to basement. BOOM he put a wifi extender. Plugged ethernet into it. Then ran another 50 footer from that, to my pc. All tight to trim around the house..,,. But if you want you can take a spool to your attic, or a longggg ethernet cable with ends pre attached , drop the 1 end wherre your modem is upstairs down the wall cavity, punch hole in wall and plugin to modem (or proper way is to attach to a ethernet wall box, and then a little cable from said box to modem, but then walk across attic, drop down wall cavity to where you need the other end to be downstairs, punch another hole- boom easy. There is already existing holes in your wall plates where wires run through all over, can just use that to fish down with its really simple and makes the run of ethernet cable way shorter than how we had it to start above