I would like to change the spark plugs on my Caravan myself if possible because the shop wants to charge alot. Is it pretty easy? They appear to be in the front on the top and easily accessible. Thanks!

Yes, very easy. I prefer to change the plugs with the engine hot, as they come out easier.

You should first check if the head is aluminum. If it is aluminum, you should never remove spark plugs when it is hot. The different metal of the head and plug expand at different rates when hot. If you go to remove the plug, you also may remove the threads from the head.