I guess you could plant directly into the ground?
You might as well start saving up for the proper supplies you need to be successful in this hobby. It will cost you about $20 for potting soil (you can order everything from Amazon!), plus whatever nutrients you need, your tent, containers, ventilation system and and lights. (Don’t get the blurple light, they’re outdated and they suck.)
It’s expensive to get started properly, but once you get it out of the way, you can grow weed in perpetuity (at least until someone needs replacing).