Conditional fields & columns

Hi guys! Honestly, your plugin is amazing, really good job! ??

However, I try to create a registration form on my website and I need some fields to be hidden unless a specific element of a dropdown list is selected.

I also would like to display some fields on the same line. For example name and forename on the same line.

Do you know I can address these two issues?

Thank you so much for your plugin and support !

Antoine