iPhone reset

Yes, if you back-up using iTunes on your laptop, then you can restore using iTunes.

Your back up can be located here ... Locate backups of your iPhone, iPad, and iPod touch - Apple Support

Also, more about differences between iCloud and Computer backups ... About backups for iPhone, iPad, and iPod touch - Apple Support

Yes, what is saved on iCloud will stay on iCloud, even though you revert to factory settings on your iPhone.

Please be sure that you are absolutely sure that your iCloud is backing up all the data you deem critical.

Read for complete information: How to back up your iPhone, iPad, and iPod touch - Apple Support

Ginger2001 wrote:

I backed my phone up onto my laptop but I’m not quite sure where the backup went onto my laptop lol.

Is it better to restore my iPhone using iTunes through my laptop?

On the laptop, the backup would be in iTunes providing that's the process you used to create a backup -- How to back up your iPhone, iPad and iPod touch – Apple Support.

To restore your iPhone, you can choose either iCloud or the backup you created on the computer (personal choice) - Restore your iPhone, iPad or iPod touch from a backup – Apple Support.