on the transmitter on the sides at top theres a gear switch, what does this do? on the right side, flight mode, has an N and a 1. which does this switch need to be on. N is up, 1 is down?

Must be on N .

And it's a reallllly good idea to secure that switch to the N position with rubber bands.
N is for Normal flight mode... the 1 position refers to 3D flight.

What happens in the 1 position (3D flight mode) is the throttle goes full blast..
and the throttle toggle now acts as a pitch adjustment.. changing the pitch positively
and negatively to allow it to fly inverted and perform other aerobatic maneuvers.
So if you accidentally flip the switch from N to 1 on the ground or if you are working on
the helicopter the blades will spin like crazy and chop your head off.

The above is in your manual, if you don't have a manual look in this forum you will find links
for one or two of them... The Eagle 50 is basically a clone the Walkera 22E and the Venom Night Ranger,
so those helicopter manuals and almost all the parts are interchangeable.

While not in your manual... the G switch deploys a parachute.
Just kidding. It doesn't do anything but a parachute would be great flying
high altitude and a tail motor burns out. It happen to me at 5 feet off the ground
so landing wasn't too bad.