Can anyone help me with the landing page

I am struggling with the form on my landing page . I want the size of the form a little bigger. can someone pls help me with my code. Maybe suggest something if am wrong somewhere.
This is so far my code:https://codepen.io/Maidah-Javed/pen/qBPVPMV

I would be thankful for your help…

Your form is wrapped in a parent div. Give that parent div an id and then give the parent div a width.

I was just stuck before that , thank you so much