The fact that you're a beginner doesn't come in to it, you want to get the best you can afford. Photoshop and Illustrator are the go-to ones for professionals,
if you have access to them. Otherwise, Affinity is supposed to be good and very affordable. Just search for 'best digital drawing/art software/app' - some are even free.
It really depends on what you are wanting to draw or illustrate, but you will almost definitely need some kind of pen tablet such as a Wacom if you're working on a computer.
Again, get the best that you can afford. There's lots of advice online and thousands of tutorials, but don't forget to keep drawing with pen and paper too!
Windows, macOS, and Linux users may all use the free and open-source application Krita. It is also accessible for use on Linux. Because it is a robust and adaptable tool that packs a broad range of capabilities, it is an excellent option for novices interested in gaining significant knowledge regarding digital art.