Circular rebalancing means you send sats in a circle: out through one of your channels, in through another of your channels. This obviously cannot work in the configuration you drew, because you have 2 BTC outbound balance and 0 BTC inbound. Start by returning 50% of each channel or 100% of either one of the two channels onchain. You can do that via a swap at https://swapmarket.github.io.
Circular rebalancing means you send sats in a circle: out through one of your channels, in through another of your channels. This obviously cannot work in the configuration you drew, because you have 2 BTC outbound balance and 0 BTC inbound. Start by returning 50% of each channel or 100% of either one of the two channels onchain. You can do that via a swap at https://swapmarket.github.io.
More advanced skill is to rebalance via liquid.