Hi @Ahmed Hassanein ,
The recommended way is to use "Windows 10 Enterprise 2019 LTSC" which is in mainstream support until 1/9/2024.
The Long Term Servicing Channel does not receive feature upgrades and will force you to upgrade to 1903.
As you are already trying to install Windows 10 Enterprise, you likely will have the required licensing for LTSC.
If you cannot use the LTSC version of Windows 10, you are able to defer the Windows 10 upgrade for 365 days however, the date starts counting from the first date of the next feature upgrade release.
In this case 1903 came out in May 2019. This would indicate that 1903 will be available for install May 2020 - Which has passed.
Your best bet will be to install LTSC or look at implementing 1903/1909 instead of 1809.