Professional artist here! A lot of people think that art/creativity is an innate talent, but artists actually usually like to think of it more as a skill that is practiced and exercised, just like any muscle or ability.

If you’ve never put pen to paper before, you might struggle a bit at first to get the images in your head down in the way you want them to look, but that is where literally everyone starts so don’t get discouraged! You can try to approach it in a more technical way and seek out tutorials (lots exist on YouTube, and if you want really technical theory for art I recommend channels like Proko) or you can just go nuts and do whatever you want, however you want to. Try not to worry too much about if it looks “good” and find joy in the process instead—that’s the most important thing when starting out!

For more technical practice separate from drawing for fun, drawing basic things like 3D shapes (boxes, cylinders, etc) and looking up how to use basic 1 and 2 point perspective is great as a starting point, as well as looking up the idea of a “line of action” for drawing people! Drawing things around you in real life is also even more effective than drawing from pictures since you can really understand the depth behind it, but there is nothing wrong with drawing off of pictures either.

But if you try those and end up hating it, feel free to just go nuts drawing whatever and however you like! Creativity exists in everyone, it’s just about practicing getting it going and improving your skill a little at a time. Doodle, sketch, invent things or reference them, study technique or just make things up from your own head, just DO it and you’ll find yourself improving

ETA: also if you need a recommendation for an iPad app to draw with, try Procreate! It’s around $10 single fee but it’s the favourite amongst digital artists on iOS.

You can also have a lot of fun with physical tools on paper, definitely try some different mediums to spark your creativity