What are the steps or shapes

Hai Everyone ,
First of all i am fresher with no background of It knowledge ,But now i am interested in Dell Boomi ,So here what i want know is . I want steps or what or the shapes we need to use to convert XML file to CVS file in an on -premise atom .i have tried but its not executing .
It would be really helpfull for me from u r answers
Thank you &Regards