2015 Macbook Air came with Sequoia via Opencore. Would like to run Monterrey as well

I bought a 2015 Macbook Air. It has 10.15.1 preinstalled via Opencore. My newest OS to date has been High Sierra, so I'm happy for the opportunity to experience Sequoia (I just use this mac for Chrome and VLC so don't care about compatibility.) But some things seem really slow, like bootup, coming back from sleep, and I keep getting "Chrome was not shut down properly" after sleep. So I'm wondering about also having an install of Monterrey (unpatched/native) side by side with the Sequoia install. Is there an easy way to do this? I don't have a whole lot of interest in learning about Opencore and in general don't have much desire to run unsupported operating systems-- but I'd like to keep the Sequoia install as an option.