I’d suggest starting with learning the basics of design principles like layout, color theory, and typography. These are the foundation for all good designs.
As for tools, you can begin with something like Canva if you want something user-friendly to play around with. But if you want to go pro, learning Adobe Illustrator and Photoshop are key, especially for vector and raster designs. They have a bit of a learning curve but there are loads of tutorials on YouTube or platforms like Udemy.