4 cylinder? Easy as pie. Right there in the top, easy to get to, under a plastic cover. I use a good spark plug socket with a locking extension that locks to the socket. Put a little dab of dielectric grease on the spark plug boot when you reassemble.
Pull out one of the factory spark plugs to write the part number down. My local Auto Zone and Advance Auto never carry that part number and the dealer wanted $20-$23/plug, so I order the correct spark plugs on eBay or Amazon typically. The correct plugs are about $10 each online. Don't cheap out and buy cheaper plugs. Use the factory part number and you won't have to change the plugs again until 200K miles.
I have 500K miles on Honda 4 cyl engines and I always use the factory plug number and change them every 100K miles. Anything more/less than that is not needed. It takes me less than 10 minutes to change the plugs on a Honda 4 cyl, and likely under 5 minutes. Easiest spark plug change there is.