Hello Audio Lovers!

I've been into mixing for a few years now, I've mostly mixed just for fun but have done a few free mixes for other people. My mixes have gotten a lot better since I started and I've had some thoughts about starting to charge for them, although I'm not sure how much I should charge. What's a good starting point, in your opinion? How much do you charge clients? And how do you market your services to get clients in the first place?

As a reference, I'm including a mix I did recently, as well as the unmixed version of the song here. Am I good enough to charge in the first place? And secondly, how much do you think a potential client would be willing to pay for a mix of the same caliber?

Thanks in advance :D