Android has a cursor. If you connect a mouse using a USB On-The-Go cable (essentially a micro to full-size USB adapter) you'll see it appear. Keyboards and game pads work too.
Can use bluetooth as well. I've helped mates replace their windows laptops with android tablets for (non-STEM) uni coursework. Pick up a cheap bluetooth keyboard and mouse, a tablet, and you're good to go. The keyboard and mouse will last you a decade, easy, and buying US$100 tablets every 2-3 years, you're looking at nearly a decade before it would cost the same as a laptop.