Hi there,
Unfortunately, it is not possible to do so with regular features of the theme. What you want to achieve is a masonry view which our editor’s layout system does not have.
You can add a custom CSS to the column which has the form and adds a negative margin to force the column to go up. But that might need many adjustments when it comes to the responsive view so you will have different values for different sizes, then after that you will have the gap for the next section as the column is upper and the next one will have the gap, so you will need to do it for all other sections which come after that column.
It is a huge amount of the customization which is outside of our support scope and you may consider hiring a developer to make a masonry view for you.
Thank you for your understanding.