Not really? I'd say I'm used to seeing even higher prices, double or more your current full body prices, but those artists are usually at a higher skill level too, so I'm not too sure. I just know I'm used to seeing a certain price range for art and you're below it.
Why would you go lower? The lower you go, the worse and more entitled clients are going to come to you for commissions.
You can definitely streamline your commission sheets for better readability, for example, less text. I leave out all details about my commissions and just write a "DM or email for details" so I have more room to display artwork.
I think it's a matter for commission format. I generally don't trust artists who don't send out invoices for commissions because that's simply not keeping track of money in, money out, and records of job income. I always do invoices for new clients, and even longtime loyal clients, and only if it's with close, CLOSE friends I allow them to just send me money directly without an invoice. Doing Ko-fi commissions is fine, but you can give off a sense of business professionalism when you follow formats where you have more control and it's less "waiting for someone to donate you a ko-fi".
I actually get most of my commissions these days via Discord art channels and DMing people who say they're looking for someone to draw art for them. For example, I am part of the Live2D server, for people who want to learn about using Live2D (an animating program) and we have a small related jobs sections where people either offer or look for jobs to be filled.
In another community server I'm in for Youtube cover contests, there's a marketplace channel
I don't make commissions posts on Twitter or any social media anymore. I apply for jobs directly via DMs to people who clearly stated in a public server that they are looking for art. You should consider being proactive about finding work if you really want commissions instead of making a post and throwing it into the internet void because even with 1000+ followers, likely only 10% of those followers will even engage with your post, so you gotta take commission-finding into your own hands.
These days I get commissions fine (though I know that I only get like, 1 successful commission for every 5 to 10 that I apply for), and when I DM people with my portfolio, they don't even KNOW how many followers I have on social media, because Discord is separate from my Twitter or my Tapas.
EDIT: Sorry if I sound forceful. I'm just a firm believer in taking destiny into your own hands if waiting for it doesn't work.