am new in the game and am wondering which exchange will be best for a new trader, with respect to transaction fees and others
Binance, Bitfinex, Etc. Is the most secured exchange, One thing. Just try to visit coinmarketcap and find the best adjustment volume 24Hrs so you will see the most volume exchange there and you can decide if what is on your mind.
There is no such thing as a secured site if you don't know how to secure your account. Using a strong password is not enough, you need to add 2FA for added security. Changing your password regularly will help and avoid using birthdays or dates that have a connection to you or your family members. Nevertheless, in terms of site security, I like Binance security features, compared to others.