Nobody will have a go at you for making parts, in fact we applaud you, but we will tell you what we see because we want people to get better.
for - RDM6300.fzpz (21.2 KB)
In the PCB you need to delete the black rings in the pads "path12631"
You need a group called "silkscreen" with a black rectangle outlining the size of the part.
Level with the "silkscreen" group you need a "copper1" group where you put "copper0" inside. You need copper0(bottom copper) inside copper1(top copper) for 2 layer boards.
You can export the gerbers and load them into free Gerbv to see what production will be like.
