Joining communities of other knowledge workers who share your objective of achieving mastery of Microsoft 365 is a good strategy.
You will get peer support for your own journey, as well being able to help others on their journey.
You will get a sense of the hurdles other go through, what it is possible to achieve for your own accord, get inspiration when you feel your own journey is tough.
Microsoft is running a community called “Office 365 Champions” at https://aka.ms/O365Champions. The focus is rather technical, as you would imagine, but is a great place for those knowledge workers who have advanced quite a bit on their journey already.