Does anyone have a suggestion where I could start to educate myself on this process and does anyone of a positive experience with any broker?
My opinion may very well be unorthodox
Long story short, to be a successful trader you should have an appropriate mindset. The problem is that most people don't have that mindset and thus they are predisposed to lose in the long run. So if you want my take on this, you should first find out whether you belong to the winning minority or the losing majority. Indeed, you can find out that the hard way (most likely, by losing piles of money), but there should be ways which could show how you would actually fare in the stressful conditions of real trading (hint, demo-trading is definitely not of one of these ways)
You need to do different things than the others. Trading is about this I guess. To become a succesfull trader, as a beginner, start with psychology of the market and follow the trend
Trend is your friend, indeed. Until it turns around and stabs you in the back
I suggest you read One of the best book in financial markets "Trading in the zone" by mark Douglas. I assure you can learn a lot from this book, I hope it will help you to become a good and pro trader
I think the best way to learn the basics of trading is to work alongside a real trader with lots of expertise and success in the field