Dear Marin,
Greetings! Thank you for posting in Microsoft Community. We are happy to help you.
Per your description, I understand you want to have access to Office 365 only for learning purposes.
You may consider registering a one month free trail of Microsoft 365 subscription, such as Office 365 E3, or Office 365 E5 or Microsoft 365 Business Standard or Microsoft 365 Business Premium.
You can click Try for free from following pages. When you register, you will create an admin account.
Compare Office 365 Enterprise Pricing and Plans | Microsoft 365
Compare All Microsoft 365 Plans | Microsoft
By the way, to learn Microsoft 365, you can refer to following pages:
Microsoft 365 Training
Microsoft 365 basics video training - Microsoft Support
I hope above can help you!
Do let me know if you need further help, I will try my best to assist you further.
Thanks for your time and cooperation! Hope you have a nice day, stay safe and healthy always.
Sincerely,
Tina | Microsoft Community Moderator