Your best bet is to read through the manual, Once you have an understanding how arrays, variables, conditions and actions work, it's very easy <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">
Construct does all the hard work for you <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">
Here is a great channel that cover almost everything you need to know
https://www(dot)youtube.com/user/EnglishAcorn
Happy game making dude!