I'm 19 & have bow legs. is there any way to correct/better them non-surgically. e.g. brace or specific exercises? if not, what would surgery entail?

No: Braces are helpful only for children who still have growth left; in adults, offloading braces can help with the symptoms but do not correct the deformity itself. The surgery involves breaking your leg and placing it in aore corrected position and then holding it in that position with usually plates and screws for approximately 8 weeks until the leg heals in the corrected position.