if i slide it all the way to the left, will a transaction take 7 days? and why do i only make $1/day when i mine on nicehash if someone is making $4/transaction?

just trying to figure out how to host a private wallet and change from my bank account to usd to btc and back with the lowest fees and the quickest times. i tried sending a dollar in btc from my electrum wallet to my blockchain.com account, and it wanted $2. what am i doing wrong? thank you so much for any help