All you need is a small telescope!

"The waxing crescent moon will briefly pass in front of the planet Mars for skywatchers in parts of Asia. Elsewhere in the world, the moon will make a close approach to Mars. Look for the pair above the western horizon after sunset." ~ Hanneke Weitering

https://in-the-sky.org//news.php?id=20210417_16_100&skin=1

What is a lunar occultation?

"Lunar occultations can be classified into two groups: total lunar occultations and grazing lunar occultations. In a total lunar occultation the observer will see only one occultation event, either a disappearance of the star as the moon passes in front of the star or a reappearance of the star as the moon moves away from in front of the star. In a grazing lunar occultation, the very edge of the moon passes in front of the star and the star may disappear and reappear many times as the mountains on the edge of the moon individually occult the star.

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What should an Observer expect to see during an occultation?

A total lunar occultation will result in the star disappearing once, then reappearing tens of minutes later. For lunar grazing occultations, an observer should expect to see the star continuously as it approaches the lunar limb, then intermittently as it moves by changing topographic features, then continuously again as the Moon completely passes by. The sequence of events typically lasts from less than one minute to perhaps 2-4 minutes. Predictions of lunar grazing events are generally quite accurate; the idea is to accurately time each disappearance, blink, dimming, reappearance and any other optical phenomena visible during the graze. This is best and most accurately accomplished with a sensitive surveillance-grade video camera attached to a telescope since the human eye/brain combination cannot react fast enough in the case of rapidly occurring activity. Step events (where the star’s brightness does not drop or return instantly) may also be detected. Such events may be a signal of a double star. As can be seen in the earlier diagram of the projection of the Moon’s limb onto the Earth’s surface, a team of observers are needed to map the entire limb. They should be spread out perpendicular to each other to cover the entire lunar mountain range." ~ https://occultations.org/occultations/what-is-an-occultation/