I need a website upgrade

I am hoping to upgrade my website by adding a new theme builder to achieve a complex build, using either elementor or Divi plugins. I also need gravity form that allows users to complete a form either using step by step or single form. I need to be ble to export client data as a CSV document. I also need the landing page to be resigned and make sure its user friendly and eye catching.
I need all grammatical error on the site corrected. Any unused document removed and everything aligned.
Please review the link below, I am trying to create something similar with a few changes.
https://littleoneslondon.co.uk/

Please confirm if this is something you can do.


Kind regards,