If you don't learn the reasons why and why not, you get: why is this getting hot, why is this not turning on, it worked for a moment etc.
I recommend asking questions here and you will get the help you need. There are some basic characteristics we recommend you to look at when selecting components.
There use to be a link "ABC Arduino" or something like that where you could down load a PDF of typical circuits for the Arduino. I recommend hunting it down if it is still available.