Details here: https://www.altcoinbuzz.io/nft/what-is-opendao-and-sos/
Or just to to: https://www.theopendao.com and do it there
Right now I am getting an error message that I'm "not eligible", which is BS. However, a tweet yesterday from them claims that's the result of server errors. You have until June 30 to get this done.
The amount you get is based upon your level of activity on Opensea up until now, as well as whether you got scammed on there (lol). But anyone who did a single real money transaction there is eligible for at least something.
While some are concerned that $SOS itself could be malicious, those who have examined it claim that the contract looks straightforward and basic, so probably no worries there.
If you don't know what I'm talking about here, ignore this.