If you’re using Google services, stay with Google services.
if you’re using Microsoft Office, stay with Office.
You will need to acquire macOS or iOS or iPadOS versions of the apps involved, as the Windows versions of the apps will not work.
The documents can be copied around.
Mac tips for Windows switchers - Apple Support
Move your data from a Windows PC to your Mac - Apple Support
Expect to need a decent-sized hard disk for backups, maybe 4 to,6 TB in size (that’s about the best price-capacity range lately), with the size depending on how much data you have and how fast your data is changed. Time Machine can then be used, and can take care of your backups, recovery, and migration to,a,new Mac when this Mac is replaced in five or seven or however many years.
General comments…
If you order an M1-based system, I’d get the 16 GB configuration, and get more storage than you think you need. Newer Mac M1 storage and newer Mac M1 memory is not upgradable. Get what you need for the life of your Mac.)
I don’t tend to use the Google tools and for various reasons, and the Safari browser does well for my needs.