Welcome to the DB community.

In regard to your team choice, you might want to consider a priest or druid as your healer. Pallies are great single target healers but there are a number of heroic bosses that do AoE damage, and it can be difficult to heal through with pallies.

As far as keybinds go, these are very subjective, so there's no 'best' method other than whateer you are most comfortable with.

For Macros and Addons, have a look in the Macros and Addons section of the forms (bet you never saw that coming! ).

I would definitely recommend getting Jamba, as it has been written especially for boxers and has a bunch of features that make boxing a lot easier.

Cheers,
S.

PS - moving to the new users forum.