Mempool is like giving your transaction to a kid to get on the bus plus bus fare. He waits at the stop, buses come in every 10 minutes.
The bus has limited seating. Those who pay more get to be seated. If the bus fare you offered is less than the others waiting, he waits for the next bus in about 10 mins. If the bus has empty seats any fare you might have chosen is accepted and the boy gets to take the bus. That’s your transaction utxo taking the blockchain bus to the miners to be processed.
I follow this bot that tweets out mempool estimates @CoreFeeHelper