First, only mine with these servers if it's allowed
Monero is the obvious choice and the most regular for CPUs miners, it's stable and solid, easy to predict the profits, you can check here how much you can earn, you only have to put the hashrate of your CPU and power usage (not your case) :
https://whattomine.com/coins/101-xmr-cryptonightrAnd there's some "bet mining", this coin is very good to mine but not so profitable at the moment, people are mining to sell after some time, and you can stake the coins you mined too, so it will increase your final profitability:
https://veruscoin.io/Both are very easy to create a wallet, download the miner, and mine