Need 1 song mixed :)

How are you? :) I'm looking to find a mixing engineer that will be the right fit for my music, grow with me and that will become part of my team. I'd like to know how the process works with you.. do you do a pass first before? And once is on the right path, we move forward with the payment? or...? I'd also love to listen to some of your mixes if you have any playlist to share. Thank you!