Hi Ernst, You are doing well. I find orchids difficult to photograph. They are such magnificent flowers one almost expect them to be photogenic. I also prefer the first shot. A few suggestions (I am not an expert)
1) 1 or 2 extra F-stops would have made a big difference to increase the depth of field (DOF).
2)A slight decrease in brightness or increase in black (referring to Lightroom) will remove any other color than black in the background.
3)Try to have the light slightly to the side to get a more 3-dimensional view.