Somewhat, you were not able to find the correct answer after posting your question. The trading platform AvaTrade is now improved a lot. They are regulated by different famous regulatory bodies and now safe for their traders.
I don’t have any idea about the brokers. You can start your real account. However, starting with a $10,000 dollar will not be a wise decision. It is better to start with a small amount. Oh for better understanding, you can check this review on Avatrade. The review is full of information regarding their platform, regulation, features and some other important terms.