Coins have to sit, unmoved, in your wallet for the maturity period before they will stake. Tokugawa has a 24 hour maturity period. Just leave your wallet running and unlocked for staking and you should start to receive staking rewards after they mature. The more coins you have, the more stake rewards you will get a day. Once they are mature, hover the cursor over the Staking icon at the bottom right of the wallet and it will tell you the estimated time before you receive a stake reward.