Hi you,

#1. Edit Project with Elementor: please go to Admin dashboard -> Elementor -> Settings -> General Tab -> Enable Projects: https://ibb.co/VqP0qfD

#2. Create new project and use the layouts: You can save the demo layout as a demo template, then import this template into a new project when you Edit with Elementor

#3. Setting Project search:
Step 1: Install CMB2 plugin https://wordpress.org/plugins/cmb2/
Step 2: Go to Project Setting and setup search project: https://ibb.co/3pB0P43