There's a lot of potential in this one. I like the photo of you, but the background is distracting. I don't hate the background, but I'd rather see some bokeh in it, depending on how skilled you are with photoshop you could easily do this in post-production. I'd add a background blur so the background is a lot less in focus. I do quite like the fact you can see the background, and the warm light over the edge of you brings a really nice comforting evening vibe.
You could probably afford to crop in even further. I'd consider cropping in so that the top of the frame ends at your hairline, and the bottom of your the frame ends at where the xlr cable goes into your mic (or the bottom of the pop filter arm) that would give an even tighter zoom on your face, and you want to be the star of the show, not the houses in the background (add extra blur to the background, I'd blur it up to about 50%-75%)
And finally I don't like the font. It really feels like an afterthought. I don't mind the text style on the right, but for a thumbnail that feels so fresh and even a bit arty and homely, I'd go with an organic handwritten style font that's possibly cursive, and I'd do it in white with a black drop shadow. I just think this thumb would look extra amazing with a nice white arty handwritten style font.
The rest of the photo however with you and the mic is fantastic, and I love the warm lighting.