Did anyone bother to tell you what iCloud does do for you? Had I known all of what this stuff could do, I'd have been signed up and using it years ago.
Do you have a Mac or just your iPhone? Consider buying a Mac if you don't. It works in ways you never thought to ask for. There is no excuse for Windoze. None. Life it too short.
With those things turned on and synced, you can pick up any of your Apple devices and walk out the door with everything you need, right in your hand.
Example: you enter an appointment in your Calendar on your phone. It's automatically also on your Mac and any other devices you have (iPad(s), Apple Watch, Mac). Same for your contacts list. They're all synchronized. I no longer have to pick up my phone to find someone's email or phone number. It's done. Seamless.
Take pictures on your phone. It's backed up on iCloud and as soon as it has Wifi, it will sync down to your Mac and other devices.
Safari will sync not only your bookmarks but, you can stand up from your Mac, pick up your phone and Safari knows what you were looking at and even where you were on the page.
Pages, Numbers and Keynote work that way too.
If you need extra storage and sign up for iCloud plus, even at the $0.99 or $2.99 level gets you the ability to get to all of that data from a PC, using the browser of your choice. I can log into iCloud on Firefox, on Windoze 7. I can see, share, download any of my pictures. I can access my Pages, Numbers and Keynote files. I can even make changes and updates to them. Apple has browser versions of the programs that offer many of the basic functions.
I have created a spreadsheet in Numbers, built formulas and everything, and saved it, all from the PC. No Apple devices involved. I did the same in Keynote. Built a presentation that would stomp anything out of Powerpoint. It never even touched a piece of Apple hardware.
iCloud is a lot cheaper than paying for a MS365 subscription. Even if you don't have a Mac, you can do more with iCloud per dollar than you'll get out of Microsoft. Even from a PC.