It's tricky at first but when you'll see your first hash being submitted to the pool you'll remember that moment. 
Here's the websites I use and that will help you. If there's anything let's do a google hangout where I can help you. 

https://www.whattomine.com/coins (compare mining profitability)

https://www.nicehash.com/?p=nhmintro (nicehash is one of the biggest if not biggest multipool where you mine automatically the most profitable coin. their miner is supposed to plug and play but didn't worked for me. You get paid in BTC.)

https://dwarfpool.com/eth (the biggest ETH pool. the instruction to begin mining are on the left. they're pretty straight forward but expect to make some mistake at first. Try to follow the instruction by the letter and triple check each information)

http://monero.crypto-pool.fr/#getting_started (the monero pool I'm currently mining on with the miners listed. click on bitcoin talk depending on if you have a NVDIA or Radeon)

I think this is a good start!