How do I properly learn songs on the piano?
Do I practice it with the right hand by itself first than the left hand by itself and finally both?
Whats the proper method?
Well firstly and most importantly, figure out the timing. go through the entire piece, clapping your hands, or tapping the piano for when the RH would play. Then do it again for the LH, then, start with the right hand at an easy speed, watch your fingerings carefully, go through the piece a few times getting faster each time. Then do the same with the LH, then SLOWLY, put them together.
Good luck and have fun.