Iphone Backup and Restore

Hello,

I have an iPhone 6s Plus and I want to use a new iPhone 8 Plus,

I tried to backup my WhatsApp data to the iCloud (I have enough space) but it reaches a point were it stops but the wheel backup wheel still spins.

My question is: can i backup the iPhone 6s Plus on my MacBook pro (backup to this computer selected) and then restore this same backup onto my iPhone 8 Plus and still have all the WhatsApp data?

Thank you all!