I don't think that their is exchange for newbies because you are expected to know how to trade or someone will do the trading for you. However, when it comes to trade their is no newbies but you can be newbies on bitcointalk rank. Some that just started investing in crypto should seek more knowledge about all it takes.
Trusted exchanges are good for the beginners and for all traders. If you are a newbie, it does not mean that you need to use some special service. Deal with the reliable sites, and pay attention to the exchanges popular in your country.