Good to have you here, brother Louie Louie Louie (if you get the reference
The installed RAM seems to be 4GB which is good enough for your application and to run Minecraft. Unless by editing pictures you mean photoshopping high resolution pics, then please state that.
The minimum required video card is an equivalent of nVidia Gefore 9600GT and that requires a 400WATT system PSU which means the modern approximate equivalent of nVidia is a GTX 650 (newer generations don't have low profile video cards like what your system supports). Just make sure that card fits in the case and you get a good PSU of minimum 400WATT for it. That could be more than needed, but it's gonna be above borderline. Better than a little below borderline and have electrical shorts.
That's my view. Perhaps if you ask in the right section you'll get better answers.