mining is like any other activity, we need to know about it in order to make profit. The first thing to do is to search for info because there are several types of mining as well as several types of mining equipment. Energy is also something you need to address.
And of course, a decent mining strategy

There are a lot of resources online that can help. Recently I've found a new project in which they are starting their mining activity with one miner and they are detailing everything online through a newsletter... (it is free of charge) - this kind of stuff can help on your first steps and also to show the feasibility ... (these guys are called "crypto sieve", if I recall correctly... you can search them on twitter
cheers