For every new investor, the most important thing is an exchange, because the crypto market is full of spam and we need to be careful before every trading. Here are some good exchange reviews which you can read before investing.
1. Binance - Binance is the one of the most popular exchange, you can read the full review here.
2. Kucoin - The new exchange which generally hosts so many contests for their customers and also very secure. here is kucoin brief review.