Did I do it right?
Yes, but you signed the wrong address. Sign the address your operation uses

Balance
0 ETH / 0.00 USD
ERC-20 Token balance
0.00 USD
Received (approx.)
0.000000000000000000 ETH /
0.00 USD
Spent (approx.)
0.000000000000000000 ETH /
0.00 USD
We recommend ETH 5 - ETH 10 for our users, but at the same time, we have methods to crawl up your capital from virtually no minimum.
We do multi-layer cross-protocol arbitrage focusing on Ethereum (ERC-20) and Binance Smart Chain (BSC) enhanced with flash loans when possible.
So, we usually count in BNB. BNB 70 - BNB 150 is an ideal budget.
It's kind of important now that you prove your words since you are asking for ETH.