Recently I found a new broker, but I lack competence to adequately evaluate it. Olymp Trade offers a demo, opening a real account of ten dollars minimum and several dozen assets. Is this enough for a beginner? I asking because I don’t want to waste time and give up on the chosen broker.

I am not sure where have you found that you need something like $10 to start here https://olymptrade.com/ but maybe it's all really true, so let's wait out for sure. Learn more about that here please https://olymptrade.com/about. Post results here as well.