Is this good for my first time making a map?
could i get some advice for what to tweak.
Ultimately depends on what your going for in your game/project . It’s not a bad job by any means, the only thing that stands out is the sharp line between the grass and rock material. Id spend a little more time with a smoother transition and maybe maybe break up the grass plain with some patches of dirt or rock and some grass in the lower points of the hill/mountain area to give it a more realistic feel, for immersion purposes. Overall good first run. The more you work with the engine and develop skills as an artist/level design you’ll get better and better results. Good work and best of luck 
thanks i will try and do some smoothing