Good point Texas mockingbird. Eventually I’d like to put up an online metronome as a free resource, but in the meantime, you may want to try using a store bought one or you can use this one - Just remember that in the beginning it’s not about playing things up to speed (this includes switching between chords), it’s about playing them accurately while keeping some sort of rhythm. So slow things down as much as you need but try and stay on the beat. Over time you’ll naturally be able to increase the tempo. It’s a lot like trying to exercise when you’re out of shape - you may be winded after walking to the mailbox in the beginning but as you keep trying, you’ll notice you can walk a little farther each time.
By the way, if you have any questions on any of the videos or materials in the course feel free to ask them here. I’ll answer all of them and if it’s something I can’t answer via this forum - we can do a quick Skype (webcam) session.