Last night I spent the whole night trying, but I couldn't stake successfully, forget it.

$USUAL has not been staked, I do not recommend you to stake. I personally staked and received an annualized return of about 50%. To receive usual rewards takes 7 days. Unstaking incurs a 10% penalty fee, so retail investors currently have no advantage. I was an early miner and the annualized return was very high. This staking reward starts to be calculated 7 days after staking. The market is unstable now, and we do not know what the market will look like in 7 days. You are focused on the interest, but they may be focused on your principal. This price point is quite good; some suggest selling.