Hello,
Survey form : https://codepen.io/prasadseth/full/PXbXZg
I shall appreciate any honest and constructive feedback for improvement and learning.
Thank you ! 
Try aligning everything to the left, then to the center. You can try this with the input and such at the top. For example:
Make your font size bigger.
The gray placeholder text is hard to read.
This is how i did my input boxes for email and such:
It is very simple and effective, i suggest trying it. Doesn’t have to be 100% width, but it is more responsive and nicer.
Two-tone your webpage. See how I have a background, then I have everything on one main div?