So.. as weather is cooling down, I realized that I still had the fruit, and today I finally pulled the seeds from them. As I am a big fan of just following nature, I plant the seeds directly and place the pot outside. The seeds will experience the same weather as normal, and the seeds will wake up come spring.
So, time for waiting now. The collected seeds are outside. In spring they should germinate. And then it is only another 10 years before I have plants worthy to start training as bonsai. But then again.. You do not have to sit stil in the first years. You can start baby bending from a few months of age. If you do not have any experience growing from seed, have a read. I think growing bonsai from seed is a nice experience. And with these collected seeds from Malus you can have a nice bonsai is about 10 years.