where to start? and what to use for this application?
http://lmgtfy.com/?q=How+to+mine+altcoins+using+your+GPUArguably the easiest/most noob friendly way to mine would be to download the nicehash miner,
https://miner.nicehash.com/, and simply mine the algorithm that gives you the most profit in BTC.
However, if their platform gets hacked, your funds that you haven't withdrawed yet ( they have a withdraw threshhold), might be lost, as has happend in the past.