Need advice on process to upgrade from Office 2010 to Office 365

[Ltripreno]

I have made the decision to upgrade from Office 2010 to Office 365.
Office 2010 is on my existing computer, and I will start Office 365 on a new computer.



Here is what I have imagined the process might be:

- on both computers, turn off wifi (to prevent any updates, downloading)
- Back up *.pst files and other Office files on old computer
- Change email password on all accounts on old computer by adding X to the end (to prevent connection to ISP)
- Use EaseUS PC trans (or similar utility) to migrate/move Office 2010 to new computer (I don;t think I can re-install it)
- Turn on wifi on new computer
- Start Office 365 on new computer
- Setup all accounts on Office 365
- Office 365 will "recognize" the Office 2010 installation and migrate everything from 2010 to 365 ???

Some more specific questions:
- Do I need a 3rd party utility to "move" Office 2010 to the new computer? Like EaseUS PC Trans
- Do I need a 3rd party utility to "import" PST files into Office 365/ Like Kernel Import PST to Office 365
- Can you point me to a source, or document, or website that may have this process defined?
- What happens to archive PST? Do I need a 3rd party viewer? Like Kernel Outlook PST Viewer. Can Office 365 access/allow viewing of archive PST?

Thanks in advance!!!