Thank you Luke for your response.
From the given pre-requisites step (1), what is the procedure to get the email for Partner trial subscription for Dynamics 365 F&O. Could you please help with that.
Pre-requisites
1) You've received an email that invites you to participate in the preview.
2) If your company has an organizational account with Microsoft Online Services, and you're signed in, you must sign out before you
continue. Alternatively, you can use InPrivate Browsing mode.
3) If you aren't sure whether you're signed in, delete your browser cookies, and then close your browser before you continue.