Account ascess information.

I tried to sign into my outlook account as usual and it would not allow. I set up the new Microsoft account but cannot assess the information that ai had in my outlook account. I am not happy about this.I had that account for years and have many emails and saved information that I need and subscribe to.What can be done about this.First we had Hotmail then Outlook now Microsoft. Please no more changes for a long time.I need to get my email content from the Outlook account back.Iam not the most computer savvy individual in the first place .Tell me what to do and I  will be pleased about that.