Hi there! Your discovery of your Chuwi Hi8 tablet is fantastic! Updating from Android 4.4 can be a little challenging, particularly since newer Android versions frequently don’t work well with older devices. I advise looking for modified ROMs made especially for your smartphone on communities like XDA Developers. Just be sure to properly follow the flashing instructions and make a backup of any crucial data beforehand. I wish you well and hope you soon have access to the Play Store!