"To use a practical example, it might sound very unreasonable if I'd asked you to build a house from scratch by yourself... but if I also show you that there are step-by-step blueprints available online for free, and that someone else dug and laid the foundations already, then show you how to put one brick on top of another, one at a time, how to check it's level, how to stick it together with mortar, and finally remind you that it's okay to get help from a plumber to do the plumbing, and get a building inspector to sign it off at the end, it turns out it's a matter of starting."