yeah this idea actually exists, i think it’s called a mass driver, which is essentially a very high-speed rail gun, that shoots objects directly into orbit without the object having to have much of a propulsion system itself.

This obviously only works if the object isn’t slowed down by atmosphere, which means you’ll have to launch it from high enough up.

This is where the pyramid comes in. You can, of course, also utilize naturally occurring mountains, if your planet has any. These mountains would have to be rather high, though. Like on earth, maybe 100 km. The highest we have are 8 km.