If you want to skip all those and here is an automatic shell script, you just need to substitute your username and password.

#!/bin/bash
# Install Wolfram Engine

## 1. get the wolfram engine
sudo yum install wget
sudo wget https://account.wolfram.com/download/public/wolfram-engine/desktop/LINUX

## 2. Install engine
sudo bash LINUX

## 3. Install and activate script
cd /usr/local/Wolfram/WolframEngine/12.3/SystemFiles/Installation
sudo yum localinstall wolframscript-1.6-20210521191.x86_64.rpm

wolframscript -username your_username -password your_password -activate 

## 4. Get the Jupyter frontend support
cd
git clone https://github.com/WolframResearch/WolframLanguageForJupyter.git
cd WolframLanguageForJupyter/
./configure-jupyter.wls add