I've used the Herman Miller Aeron chairs and really wanted to get one for my personal studio but couldn't justify the price - I tried out some chairs from Amazon and ended up with one that is very similar to a Herman Miller - mesh seat and back, adjustable lumbar support for less than $200 - I checked my order history and it seems the one I bought is no longer available. I did find a model similar to it for under $200. You may have to buy one try it out for a week and see how it feels, make sure they accept returns before ordering and if you dont like it you can return it and try another one until you find the one that fits you. Check out this chair and see what you think. https://a.co/d/00dbdmxG

This is a great community for support and feedback in your journey to learning more and improving on what you know already!