Yep, unless you have perfect pitch, you don't really need to to worry. Just tune each string down half a step and play 'as normal'.
Equipment wise, some people like to use a heavier guage string than 'normal' when tuning down. I wouldn't worry about it though, I played the same gauge strings in Eb and E for years. Technically, you might need to adjust your truss rod to compensate for the difference in tension.
This is all just stuff worth bearing in mind- I wouldn't worry about it for now, just see how you get on.