It's easy. In China most people do that at noon, even there's no bed around. People usually take a 20 mins nap at their desks. Preferably after lunch because it's easier to fall asleep because the blood sugar would rise after eating.

Sleep at a desk might not be the most comfortable thing, but it's not bad at all once you're used to it. Or get a small bed around if you can. Sleep masks are surprisingly helpful, too.

Just relax and don't be upset if you cannot fall asleep fast, even if you can't fall asleep you'll find yourself more productive in the afternoon - it's like an implicit meditation. There are also times that people only actually sleep like 5 minutes out of 20, but it usually subjectively feels much longer than '5 minutes' because time feels longer when sleeping and it's very refreshing.

As time goes by it will become a habit and you'll fall asleep fast. The downside is you are likely to feel worse if you have things to do at noon and miss the nap.

IMO the best thing about taking nap at noon is it reduces the fear of sleeping too little at night because you know you can more or less take a nap and get a partial reset at noon.