The reason the said two people instead of total weight needed is because you need to keep the mast from going under the water, i.e turning turtle.
So.... if... you find yourself nearing a capsize.... get your butt up on the windward rail asap.... you'll probably have the centerboard down anyway... but your goal is to keep the mast from sinking.... You can rig a righting line to the mast base ahead of time if you think you'll need the additional leverage or stability when standing on the centerboard. Anyhow, while you're balancing up on the rail, getting the boat stable and making sure the sheets are uncleated.... slowly work your way to the centerboard.... there's a good chance, unless youre fighting choppy waves, that the boat will start coming back once you move your weight out a bit....
As the boat begins its uprighting, you may have the opportunity to slip back into the cockpit without getting wet..... that's the goal anyway.... watch your head.... the boom will be moving pretty quickly.... get your weight to the other side of the cockpit to discourage the craft from flipping over the other way.... again, watch your head.
I've taken a lot of dinghy sailing classes and lessons over the years....... ALL of those that were taken through a school, university or yacht club... required its students to demonstrate the ability to right the boats after a capsize.... that's for each dinghy class.. from sabots, lasers, lido 14, hobie, capri 16 etc.... before they were allowed to check out a boat from club/school fleet.
I recommend you practice once you acquire the boat... a calm day near the shore, wear a wetsuit if needed. Because of he calm conditions, you'll have a hard time getting the boat to capsize at first... but that's a learning experience too... Have fun.... once you figure out that you can get the boat upright your confidence will soar....