I done under stand how it is possible for the moon to be in orbit. Would it not have been flung out on either an escape orbit or a parabolic orbit. Would it not require some thing to slow it down to get into a stable orbit.
You have to understand, that when the moon formed according to the currently best theory (yes, that means it can be slightly wrong. There are still many open questions left for improvements), Earth did no longer exist, except a small practically liquid rock remainder.
The moon is not suddenly there. It orbited around the badly battered Earth as a cloud of ejected mass, much more massive than the moon today. A large part of the debris cloud dropped back to Earth over a relative long time (a few dozen thousands of years), another part formed the moon, a small part formed possibly NEOs around Earth.
Also how is our moons orbit so relatively circular?
You have to think of the debris cloud like a subway station during rush hour. When nothing is around, you can walk from left to right in the passage way without problems, but when thousands of people try to catch their subway, you will bounce against a few people before you better move with the flow of people.
Same happens in space in such a debris cloud. Particles collide, with each collision equalizing the momentum. the velocities become quickly similar with only very small variations.
So, the moon already started in a pretty good orbit. And then, you get the tidal effects. The acceleration that makes the moon move slowly away from Earth (As result of the moon slowing down Earth rotation) also removes a large deal of eccentricity. The moons orbit is still pretty elliptic because of the effects of the sun and the other planets, but Earth also pushes the moon back to a more circular orbit, since the moons eccentric movement in an elliptic orbit relative to Earth constant rotation during the day means, that when the moon moves away, it will fall behind the tidal bulge on Earth and be accelerated stronger by Earth, when the moon moves closer to Earth, it will fall less far behind and receive less acceleration.