Hi@akhtar
Currently there are three major players of the cloud computing industry AWS, Microsoft Azure and Google Cloud Platform which have a market share of 50%, 21%, and 18% respectively. Among them, I suggest you to go for AWS as there is a huge requirements in the IT sectors.
You can go through AWS Solution Architect Certification Training.This course content covers all the basic to advance level topics along with use-cases that are required in IT industry.
Hope this is helpful.