How to Secure a Linux Server and Website Project [CyberPanel ent + LiteSpeed ent]

I never use linux, also english its not my native language i hope you guys can be patient with me since im trying to learn but im lost. if possible i rather buy to speed my learning curve.

My Goal is to build a 1-3 Landing Page to sell Houses like this. (1-5 Images, 1-2 Videos, Small amount of Text) I need a ultra speed website because i going to pay for advertisement on google ads and if i have a fast website i end up paying less to advertise + better experience.

My Involve knowledge (Angular 2 and Typescript 2, i started Node.js but stopped at the beginning) I plan to go back to studying in the future to make a website on NGNIX using node.js and mongo DB or any BD better for those languages.

Since I don’t intend to learn code at the moment, I plan to make the website above using (Ubuntu 20.04 + CyberPanel ent + LiteSpeed ent + Redis + PhP + MariaDB + CloudFlare + Wordpress + Elementor Pro and use Google Cloud because its the closest server to me)

I have no idea how much about security I will need to know to make this landpage without my wordpress being hacked or my clients’ information like Name, Phone or Email being hacked)

I tried to found info about security Linux Server and Websites and i found the following bellow:

The biggest security channel I found on youtube was HackerSploit and Chris Titus Tech ,do HackerSploit sell any courses ? i notice him is teaching security using LAMP but i plan use Cyberpanel + LiteSpeed, idk if gonna be helpful to me.

I also found a Comprehensive guide on how to recover from server attacks by wpjohnny, I tried to read more the content was very technical and little explanatory for beginners like me, at least it gave me an overview of what I need to learn.

*If possible i rather pay to learn than get into documentation but im lost cause idk what to buy. Above is the best resources i have, bellow i will take a look but i dint tried yet, recommend by Digital Ocean Suppo:
Cyber-Security Full Course( Concepts & Types of Attacks)
Linux Security & Hardening Playlist
Securing Server with Fail2Ban
Common WordPress Security Mistakes
Sucuri Website Security
Recovering from a hacked website
Least Privilege Principle
C.I.A Triad

Digital Ocean Support also recommend: Please also keep in mind that in security regular backups are one of the best tools for recovering from a compromise.One thing we want to stress when discussing snapshots and backups is that we always recommend having multiple backup sources. This means even if you are using snapshots with us, we recommend having at least one other method of backing up your data, in preparation for eventualities you cannot predict. I personally recommend one VPS-level backup (snapshots/backups with Digital Ocean), one block-level backup, and one file-level backup (this can be done easily over FTP to your local computer), all with different providers.

We have a great guide on what that means and various options for those services here
7 Security Measures to Protect Your Servers
How To Mitigate DDoS Attacks Against Your Website with CloudFlare
Security community
Private Networking Overview
DigitalOcean Data Security

HARDENING SECURITY TIPS FOR LINUX SERVERS
25 Hardening Security Tips for Linux Servers
Linux hardening: A 15-step checklist for a secure Linux server

Any tips where i should start are welcome, i will try keep update, if possible remember My Goal is to build a 1-3 Landing Page to sell Houses like this. (1-5 Images, 1-2 Videos, Small amount of Text) I need a ultra speed website because i going to pay for advertisement on google ads and if i have a fast website i end up paying less to advertise + better experience. Since I don’t intend to learn code at the moment, I plan to make the website above using (Ubuntu 20.04 + CyberPanel ent + LiteSpeed ent + Redis + PhP + MariaDB + CloudFlare + Wordpress + Elementor Pro and use Google Cloud because its the closest server to me)

If you want to use WordPress, I can hep I have a plugin tested with the members here, and very secure. Let me know, Global Site Guard