Hello @Emmanuel Agyepong welcome to Q&A.
First of all, u need understand that question have not a simple answer.
creating a new environment in Azure is not something you can do with just a few "clicks".
I truly recommend that you start reading some of the documents below to understand the complexity of your question, cause have many factors to explain here...like VM, VNET...or other base concepts like securty, VPN and acess control...mainly because it is your ERP
https://video2.skills-academy.com/en-us/training/modules/describe-azure-compute-networking-services/
https://video2.skills-academy.com/en-us/training/modules/describe-azure-storage-services/
https://video2.skills-academy.com/en-us/azure/virtual-machines/
https://video2.skills-academy.com/en-us/azure/virtual-machines/windows/quick-create-portal
I hope this help you, and give you expertise to understand how to resolve your question.
Regards