A family of Microsoft word processing software products for creating web, email, and print documents.
Hello Jedothek
Hi, I'm Karl and will be happy to help you today.
In terms of accessing your files on OneDrive which I assume is what you are accessing about, you just need to log into your OneDrive account using the same log in credentials as your Microsoft Account
https://www.microsoft.com/en-us/microsoft-365/onedrive/online-cloud-storage
Regarding MS Teams - that is described in
What is Microsoft Teams? https://support.microsoft.com/en-us/topic/what-is-microsoft-teams-3de4d369-0167-8def-b93b-0eb5286d7a29
Find the right Microsoft Teams for your needs https://www.microsoft.com/en-ca/microsoft-teams/compare-microsoft-teams-options-b?OCID=AIDcmmzl2axqp9_SEM_ec3e0879e5311a0e760a6b6f86a8bddd%3aG%3as&ef_id=ec3e0879e5311a0e760a6b6f86a8bddd%3aG%3as&msclkid=ec3e0879e5311a0e760a6b6f86a8bddd&activetab=pivot:primaryr3