Finally, after two and a half weeks of digging into Blender, Krita, Gimp and Poser, I'm proud to present the result of my work and your kind assistence.
To make myself clear, without your advice and support nothing of this had been happend!
Today I uploaded the Hood, Mask and Snorkel.
They should be avaible in short.
The Aqua Lung, the Weight Belt and the Diving Vest are the next goals, but I have to do some research on some technicalities, so please bear with me.

Thank you very much and I hope you have fun using my Products.