I'm very much an amateur but Krita is a great piece of software for me and does everything I need so far, for free. Much easier to use than GIMP, seems quite comparable to Photoshop and the development is going strong. It's also neat that they now include by default a lot of the deevad brushes as it's a broad selection. Keep up the good work Krita team.
I like good tools as much as anybody, but I am always impressed with what a little talent and practice can do with existing tools. This story was in the news lately, about a woman that uses nothing but MS Paint: https://mymodernmet.com/grandma-ms-paint-art/
Use what works and what you're familiar with.
Not that Minecraft has particularly demanding graphics!