Hi, welcome to the forums and to lifting in general! Congratulations on your results so far, thats great! It takes a lot to get started so well done for sticking with it up to now!
As for losing fat, 80% of your effort should go into diet management because thats where you'll see the most results stemming from. Just assume exercise does absolutely nothing towards fat loss because diet really is that important.
With your question about cardio, since you're already exercising 6 days a week (and personally i think another rest day or two would do you the world of good) i wouldn't add the extra cardio in the evenings. Contrary to popular belief you really don't need an excessive amount of cardio to lose fat.
If you want to add something else to your routine i would drop one of your cardio days (take the weekend off and enjoy yourself!) and add a few minutes of high intensity cardio to the end of your weight training days. HIIT is great for promoting fat loss.
Could you provide us with some stats about yourself and your diet so we can help improve some things?
Height/weight/BF% if you know it, etc.
Are you tracking your calories/macronutrients every day? If so what are they?
I also highly suggest you give this a read:
http://www.ironmagazineforums.com/new-members-begin-here/97077-read-me-first-homework-1-newbies.html