I would agree that RingCentral Meetings is not the same as TeamViewer. RingCentral meetings allows you to share your screen. It's meant more for presentation or training. Not so much Unattended access. TeamViewer is the software that would best accomplish what your trying to do.
You could probably start a RingCentral Meeting from your remote PC before you leave and then later join the meeting from your tablet. However, I don't know how you'd get keyboard and mouse control without approval from the PC.