It might be quite challenging to makes such a research. The thing is that you can check whether your broker is a scammer on that resource full of trading scam https://scambrokersreviews.com/forex-scams/tixee/ and be sure that your money is not under risk. Nowadays such companies help people all over the world to avoid risk and scam from brokers. I hope it will make sense to you. Good luck
No one!! All are same except brokerage rates. Read books on stock market, you’ll learn basics. If you get interested then go deep