I am glad to hear that you are just getting into crypto. In my experience with Blockchain, it is a safe wallet to hold my Ethereum. Transferring out of Blockchain however, like to an exchange is pretty costly. The transaction fee is my only problem with them that can be about $0.12 is USD.
In this current market, I would say Ether is a steal to get. Sitting at $387.14 right now and its high of $1,392.50, you can easily quadruple your money in a few months. And with SO MUCH POTENTIAL AND VOLUME Ether has a very bright future. Good luck to you in your cryptocurrency journey.
RE: Should i buy Ethereum ?