An exchange is an exchange, there is no exchange created specially for newbies, and the only thing that distinguishes some exchanges is just the facility that they have in place that makes trade easy and probably the user friendly trading platform that they have, and in this case, the best exchange you can ever think of relying on as a newbie is Binance, they are the largest and the best exchange for now and they have enough room to accommodate you.

They give bonuses, they have low trading fees and top of it all the largest trading volume you will ever see is on them. So I will advise you go for them first and maybe bitfinex as second choice.