Opie oils are good for service kits. Oil, filters, plugs, coolant, brake fluid.
You might also want to consider replacing both alternator and air conditioning belts too. Very easy to do.
There are plenty of guides on here that will show you how to change the plugs and I've posted some links to an invaluable long reach magnetic plug socket somewhere.
Feel free to ask any questions. There are plenty of us on here who do a lot of their own DIY.
And don't worry about grumpy DBlock