This project is a cloud computing platform that wants to give users the ability to purchase or sell computing power. Their platform revolves around their native token, which all providers will need to accept for their services, and all purchasers will need to use to pay for computing power.
For investors, this means an iExec RLC investment increases when more people want to use the platform. The token itself benefits from having a relatively low supply which is good for investors but may prove to soon be very expensive for those looking to use the platform to run their applications.
While cloud computing is certainly the way of the future, this project has many high profile competitors in this space. It's important to always do your own research but if you do plan to put some money here, be sure to check out all the competitors in the cloud computing space. There are a lot of them, and you may find that this particular one is not so appealing after some reading.
You can buy iExec RLC on a lot of exchanges, so you shouldn't have any trouble making a purchase. As usual, the highest volume trading pair is Bitcoin, but there is a little volume for Ethereum as well if you prefer to use that to make your trades. Keep in mind that the volume is much lower though, so it could be more difficult or more expensive to purchase a large volume of coins with ETH.
This is an ERC20 token, and that means there are many compatible wallet options that potential investors can utilize for storage. If you need a recommendation, then you could consider some options such as the Exodus wallet, Coinomi's mobile app, My Ether Wallet or Meta Mask for browsers. Be sure to move your tokens from an exchange to a safe wallet immediately after purchase for your protection.