Long time lurker, first time poster.

Hello to all. I've been periodically checking into this group and it seems
like most people here are nice and quite supportive. I embarked on a new WOE a
little over a month ago. I've been using the method of trying to make smarter
choices when eating, and slowly but surely picking up on the exercise thing.
I've been using a piece of software called DietPower, to log my eats & drinks,
as well as track my exercise. It seems like it is helping me more than just
trying to wing it on my own. Has anyone else used it with any success? I'm
about 30 days in, and I've dropped 8 lbs. so far from my original 240. My
current goal, which I may or may not have to revise, is to get under the 200
plateau in a 6 month time frame. I'm a 34 year old male who stands 5' 11".
Does this seem realistic, or too drastic?