Here's a more professional way to write the instructions for installing apks manually with the QUALCOMM OCTA-CORE CARPLAY AI BOX:
To install the Disney Plus apk, open the Chrome browser on your QUALCOMM OCTA-CORE CARPLAY AI BOX and search for "apkmirror.com Disney Plus" on Google. The first result should be the official apkmirror site, so click on the link to open it.
On the apkmirror site, download the latest version of the Disney Plus apk using the Chrome browser.
Next, download and install the apkmirror app from the Google Play store. Once installed, open the apkmirror app and you should see the Disney Plus apk file that you just downloaded from Chrome. Tap the file to begin the installation process. The app should install successfully once the process is complete.