iCloud Contact Sync Issue

Hi there! I'm planning to switch the SIM card out on my phone and want to make sure I won't lose any of my contacts.

I thought everything (including contacts) was backed up on iCloud. However, when I log onto iCloud I only see a subset of the contacts on my iPhone (155 out of my total 1,011 contacts). I investigated and think the issue is that my "default account" setting for my contacts is "on my iPhone" instead of "iCloud."

Can anyone confirm the below is the appropriate approach to get ALL of my contacts (the 873 stored on my iPhone and the 155 stored on my iCloud) to iCloud?

Under "Apps using iCloud," toggle OFF syncing with iCloud (it is currently ON).

In the Turn off contacts pop-up that asks "What do you want to do with your contacts stored on this phone", select "Keep on my iPhone" NOT "Delete from my iPhone."

Toggle back ON syncing with iCloud for my contacts.

A pop-up should appear (cannot verify as haven't done this) that asks if I was to MERGE my contacts to iCloud. Select the "Merge" Option.

This should now have ALL 1,011 of my accounts on iCloud.

Now go to the Contacts app Settings and change my contact default account to iCloud so all the contacts I add will now automatically be uploaded to iCloud.