Recreating a navbar and a side bar

Hello my name is Ussama. I am new to webflow and am trying to re-create a website from scratch. I want to learn how I can re-create the navigation bar and side bar from As you can see when we click the maison and creations button a side bar appears from the left side of the screen and when we click the search icon on the top right we see a drop down menu with a full search bar. I want to re-create this behaviour but since I am new to webflow I am unaware of what to search for. Any guidance both detailed or otherwise would be very helpful. I am willing to read up on topics myself but at this moment I am unaware of what to search for. Thank you so much for reading this!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)