Where can the wallet be downloaded from?
You can download Electroneum wallet at Google Play for android platform. I think you can mine electroneum at that app.
Where can I find a legit exchange?
Electroneum is on ICO phase. There's no available exchanges to buy electroneum tokens. You can only buy directly at their site
https://electroneum.comWhere can I find a chart showing the exchange rates?
As i said, Electrum is not available at any exchanges yet. But Electroneum ICO token cost is about 0.01USD
https://icobench.com/ico/electroneumAre there any obstacles or other information I should know before exchanging my money for Electroneum?
Sad to say but they are not accepting cash directly. They are only accepting bitcoin amd ethereum as payment. But you can buy bitcoin thru an exchange like coinbase so you can Electroneum tokens. Good luck.