First Welcome to the forum. A decient investment for working on any machine is a great investment. A 27 Torx wrench[angle]type or a socket with it already installed(made into the socket ]most times that Tool will be in a 1/4 inch drive makes it faster and easier.
FASTER in not always better!
Hand wrenches are best when you first start so you can get the feel of it. The 3/8 drive Ratchet a 5/inch OR 6/inch extension also a 3/8 universal (swivel)for only the Rear Cylinder Spark Plug will be needed.Sometimes you can find the 5/8 Spark plug socket with the Swivel already made into the 5/8 Socket and that works fine as well.
BE Easy on the Plugs Wires! The 3/8 Swivel will help you NOT to break the insulator on the Plug upon removal. AN Easy way to install the NEW/ REAR Spark Plug IS to use a [3/8 piece of Fuel Hose] about 5/inches long .
This way when you push the insulator into the hose you can put the Plug threads in the Rear Head and NOT Strip out the Threads from Cross threading while turning the plug into the threads.It would slip letting you know it is NOT going in properly.NO Thread Sealant of any kind needs to be used on a Normal Engine! It may take a little [practice] to get it right but [Patience is key] and make it fun to work and learn your bike.
THE front Spark plug can be done TWO Ways From the Top (HARD WAY)for some, OR you can remove the Left Scoop 27 torx screws there are usually [three] and just lay it over with wires still attached.You can remove it if you like.
NOW a 5/8 Combination open and Box end wrench [FLAT Wrench] not an Extreem offset, will slip up in there and remove the Spark Plug. Watch your hands! You can install your new plug carefully with your fingers from this area.
Slip off the front plug wire gently turning back and forth[the Boot] till it breaks the grip from being on the hot plugs for so many miles. sometimes a Needle nose pliers will help with that just be Gentle so as not to Break the Plugs insulator and yes theres a tool for that also.
Make sure the new or Old Spark Plug Socket has the Rubber Insulator Protector inside the Spark Plug Socket. THE Head Threads on these bikes CAN Strip out so keep in mind about that when Reinstalling the New Spark plugs.(NGKs Dcpr9eix) are a good plug for these Engines. If you want you can use the Stock Factory plug but the NGKs are better. Make sure if you install those NGK plugs to watch the Electrodes tip so as not to chip it. if need /want to check the GAP on the plug use a wire gapper.
If it is not gapped properly then adjust it,[35]ths./ without touching the inner tip using maybe a flat tip screwdriver, JUST don't touch the Electrodes tip.Hope this will get you in the right direction.
Remember to be patient with the Tools and yourself. Also the OIL Drain plugs on the Transmission AND the Oil Tank can ALSO Strip out easily so Gentle snug in that area works good also.Ride Safe.*Jimi