The easiest way is docker-compose.

Just install docker on your machine and follow this guide:
https://hub.docker.com/_/odoo/

Using a docker compose like this is amazingly easy:

version: '3.1'
services:
  web:
    image: odoo:16.0
    depends_on:
      - db
    ports:
      - "8069:8069"
    volumes:
      - odoo-web-data:/var/lib/odoo
      - ./config:/etc/odoo
      - ./addons:/mnt/extra-addons
    environment:
      - PASSWORD_FILE=/run/secrets/postgresql_password
    secrets:
      - postgresql_password
  db:
    image: postgres:15
    environment:
      - POSTGRES_DB=postgres
      - POSTGRES_PASSWORD_FILE=/run/secrets/postgresql_password
      - POSTGRES_USER=odoo
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - odoo-db-data:/var/lib/postgresql/data/pgdata
    secrets:
      - postgresql_password
volumes:
  odoo-web-data:
  odoo-db-data:

secrets:
  postgresql_password:
    file: odoo_pg_pass

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