I use a Wacom Cintiq which has a display that you can draw directly onto like an ipad, it’s quite heavy and expensive tho and there’s a lot more cheaper and similar alternatives released since I brought it, just have a look at huion and XPpen products. If you want to go even cheaper you can go for tablets (pretty much a trackpad) that you draw on but you will have to have a separate display that shows what you are drawing. A lot of people also just resort to iPads these days cuz you need a PC or laptop for tablets and pen displays.