First, welcome aboard! You may want to post over on the new members forum to introduce yourself to the masses!!
On the front left speaker grill (and on the right one too) all you need is your fingers. Get a finger nail or two into the edge at the top and push down while you pull out. It releases from the top first. Do NOT overdo it and break any of the tabs. Be careful and it will come off.
When reinstalling, make SURE that you get it back on completely or you'll lose it when you least expect it. They cost $15 for a new one, don't ask how I know!