Welcome to CF. It appears that you have found the "New Member Introductions" section. This is where some people choose to welcome the newbies.
You will also find that there is a "search" function in the upper right of the page. You may want to become familar with it since a lot of thing have been discussed and DIYs have been made.
You may also want to wonder over to the DIY section and view some of the stickys. I believe ShinerMiller has created a DIY on the spark plugs. It showed what he used and how it was done. Heck, there is a lengthy discussion afterwards in which people debated on which plugs to use and why.
Now go and have some fun and let us know how it went.