Website Speed

I need to have a good google PageSpeed score on my web site. I would like you to teach me how to set my wordpress site to get a good score. You will have to send me before I accept to hire you a list of what we can improve on my website. We will than be able to start to work together on the task you recommend. www.asami-paris.(com, jp, fr) is a multisite with the .com as main site - Version de WordPress : 5.4 multi-site - Version de PHP/MySQL : 7.0.33 / 5.5.5 - Thème utilisé : OceanWP - Thème URI : [login to view URL] - Extensions en place : 10Web YouTube (1.0.32), Google Analytics Dashboard for WP (GADWP) (6.0.2) - Extensions réseau en place : Deadline Funnel (1.4.2), Dropbox Backup & Restore (1.6.2), Easy Theme and Plugin Upgrades (2.0.1), Elementor (2.9.8), Elementor Pro (2.9.2), Forum_wordpress_fr (4.2), LiteSpeed Cache (3.0.8.3), Ocean Elementor Widgets (1.0.10), Ocean Extra (1.6.2), Ocean Hooks (1.0.0), Ocean Posts Slider (1.1.0), Ocean Pro Demos (1.0.0), Ocean Social Sharing (1.1.0), Ocean Sticky Header (1.1.1), PlanSo Forms (2.6.2), Redirection (4.7.1), Smash Balloon Instagram Feed (2.4), UpdraftPlus - Backup/Restore (2.16.23.24), WordPress Importer (0.7), WordPress MU Domain Mapping (0.5.5.1), WP-Optimize - Clean, Compress, Cache (3.0.19), WP All Import - Yoast WordPress SEO Add-On (1.1.8), WP All Import Pro (4.5.4), Yoast SEO (14.0.1) - Adresse du site : [login to view URL] - Nom de l'hébergeur : LiteSpeed