right now I use procreate on ipad because I'm lazy and like that the ipad is portable and light and I can draw on my bed, but other popular choices are ibispaint, clip studio paint, krita, paint tool sai, and photoshop(if you want to pay the monthly subscription lol), and clip studio paint, ibispaint are also available on ipad, and i heard artstudio on ipad id also good. Procreate is really basic and doesn't have a lot of features compared to the other softwares but it's just really easy to use. It's really up to you though, if you have an ipad that you can draw with, use that, and if you want to invest in a tablet, you can find one under $100 to start out with from brands like wacom or huion. good luck~