If you're 5'6 190 pounds and new to weight lifting it's a lot. You can have a 6 site caliper test done but it is only accurate if done by someone that knows what they're doing. CT and Berardi recommend just using those caliper measurements to track weight loss progress. I would say you're in the 20 percent range at least but that's a wild guess without seeing a picture of you.
To focus on fat loss, do a Lifting for Fat Loss type program (search) and eat 500-1000 cals under maintenance of clean foods. You'll probably need around 2500 cals a day if you're relatively active--again just a guess. Do research as you diet to avoid analysis paralysis--don't go too low in cals and eat often or else your metabolism will crash and so will you.
Expect to lose a pound or two of fat per week max--less as you get to 12 or 14 percent (starting to see 6 pack). I'm cutting now too, from 205 pounds, 13% down to under 10% in the next couple months. I had a bod pod test recently for around $50 to accurately determine my percentage--it's an easier alternative to water submersion.
Besides training hard, you must get your macro-nutrient intake in order as well as timing--read all the Berardi you can. GOod luck.