cheap poorfag option:
ikea has nice plastic bins, get two of those big ones, put heavy shit inside, then find a long shelf or whatever that is good for a table top and use that. works if you only have a small laptop or thin monitor. if you have a PC tower just put it on the floor next to table. walah, cost will be about $12-15 and you get storage inside the boxes. just don't fill with shit you need to access often.
wood is a fuckin pain in the ass to work with since you need a saw if you were to just saw legs off like someone suggests. same goes for sawing metal legs. just use two boxes until you can eat enough nutritious food, feed your brain and figure out a better way. this is short term. long-term of course you want a BALLER ASS PANTY DROPPER floor desk that gets japanese women wet upon first glance.