What kind of pc do you have? If you have anything less than a gtx980ti, 1070 or better ( rx470 480 570 580 amd equivalent) I don't believe its very profitable.

The easiest way to get started is to choose a mine-able coin and go to the website of a pool mining that coin. There will be instruction on how to get started in the help section.

An example to get you started would be siacoin, it is gpu mine-able for at least the next year and although the profits wont be high it's a good way to get started.

Hope this helped