Hi everyone ...
something new from my studio. I´m not a professional with food photography, but it is a lot of fun!
What do you say? Any comments how can I do better?

They're certainly not bad for your first set!
As for critique I would watch the exposue on them. You see how you have the big blown out area around your subject? I'd place an off camera flash (snooted to the grapes) so that you can better blance the scene. Or even just use some white fabric to soften/reduce the incoming light.
Keep practicing and keep 'em coming I'd love to see more!