Help with uninstalling 360 to install Norton Internet Security?

My Norton 360 is expiring in 2 days and my sister bought a Norton internet security for 10 devices so I'll be updating with Norton internet security instead of my current 360. I have read on other forum threads that I need to use Norton removal tool but I have no idea what I'm doing with this since my dad did my last installation. Can anyone give me a step by step process to follow with links of anything I need to do it? Thank you!