Oh. You are first persion i know who belives spacetravel is fake but belives modern astronony
Anders is the first person I know who believes that geostationary satellites are real, but doesn't believe that orbits can be changed.
It seems you have not understood what an orbit is.
An orbit (around Earth) of an object sent from Earth is always an orbit around Earth. The shape and altitude of an orbit can of course change. It can be circular at various altitudes (LEO or GEO) - the object moves at constant speed in such orbits - or elliptical - the speed of the object varies with the distance from Earth.
An object in geostationary orbit is located above the Equator at low speed, so it appears to be stationary above the rotating Earth. It is fairly easy to catapult an object to such a location using a rocket. But the object can never return to Earth.
An object in elliptical orbit going to the Moon or planet Mars must have an initial speed and direction leaving Earth to enable it to arrive at the target. It is in fact impossible. You will always miss the target or crash on the target. In either case the object must have a small mass.
Accelerating humans so they can arrive at planet Mars is not possible.
The CEO of US company SpaceX suggest it is very easy to fly to Mars. He even sells tickets of such future trips. But he is just a simple fraud.