No matter how strong your telescope, you cannot see events on Earth. You cannot see through opaque objects like walls and ceilings. All of the light from Earth is also distorted by the atmosphere.
For the Moon, you might be able to see the Moon landing because the Moon has no atmosphere. However, you have to account for the positions of the Earth and Moon when that happens because they can obscure your view the way a wall might.
For example, here is you in relation to the solar system (not to scale):
Now, let's take at where you could see the Moon landing if you were near Earth:
Your view would be obstructed by the curve of the Moon and by the Earth if you were behind it. You also have a poor view on one side of the Moon because the sunlight is shining toward you, so all you would be able to see is shadows. If we zoom back out, you can see that the Sun also blocks the view.
This means you only have 2 places to observe the landing if you happen to be behind the Sun and Earth.
You have to choose where you will observe the event, you can't see it from just anywhere.
I don't know where the Earth, Sun and Moon were during the Moon landing, this is just an example.
These drawings also don't account for other planets or stars blocking the view.
Additionally, you will want to account for gravity bending the light around the planets or suns.
Do not head directly to the viewing spot. If you do, you will catch up and run into the photons you want to record. It would be better to take a path around those photons to be safe.