Hi @Mohd Anas,
Would you be able to access Microsoft 365 Admin Center with your account as global admin?
If yes, please locate Marketplace>All Products and select a plan which includes Exchange Online and start free trial.
Take Microsoft 365 Business Basic for example (some plans may not have the trial option available):
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.