Welcome to the club!. Blockfolio is the app. Coindesk and twitter will give all the info you need. and i'd use a ledger nano s wallet, affordable and secure. with this wallet you can hold almost all the more established coins.

Lastly there are many factors that can make a coin valuable, but it all comes down to adoption. if you find a coin that you are sure will be used widely it generally will appreciate in value. Besides this transparency, immutability, and decentralization are the main pillars of any good coin investment. if a coin can demonstrate all these values and is due for some adoption..it may well be a good investment.