Well the first thing after it leaves the atmosphere is that you need to correct the course and get it headed towards where it has to be at L1 which is a million miles away,
and that’s done with this iron propulsion technique that was pioneered by the Europeans in the Smart-1 satellite that went to the moon.
You then have within the rocket a stack of a million of these very thin fliers,
so the next trick is to get them off the top of the stack.
You put an electric charge and then the top one is repelled away.