Still good time to buy more?

My mac wallet can't connect to network, what should i do? I have osx mavericks.

Hi, i jumped on the crave train a couple of days ago. I have a couple of questions.
First of all i have a mac, whats the first thing i should do? Download the wallet for mac? On the first post it says that use at own risk, what does this mean? I'm all new to crypto so sorry for being so noobish. Is there a possibility to loose my coins by doing something fatal in the process of keeping my coins in the mac wallet, connecting to a pool etc? If someone has the time to explain all this from the scratch it would be awesome, thanks!