Recently i bought the martin D41 Dreadnaught and it seems hard to play, it has Medium Gauge Strings on it. I play mostly fingerstyle, Getting into Tommy Emmanuel, Chet Atkins, Don Ross, Chet Atkins, Jerry Reed and many fingerstyle guitarist out there.

Problem is playing this guitar is so so so hard, i'm 6,3 300lbs so i'm not weak or have weak hands, it just seems so difficult, i am wondering if i'm using the wrong instrument for the wrong style or genre.

yeah, lol, martins come stock with terrible action (like hand cramping knuckle busting) spend $50 and have someone restring it and drop the action and you should be fine.