asalaam alaykoum wa ramatoullahi wa barakatouhou
first off, welcome to Islam, jazakAllahu khair for your conversion. may Allah protect you. I am a convert myself as well
I used to be on this forum a lot, but I started working again and then I gained back 10 lbs! So now I am back to get rid of these last 10 lbs once and for all!
as far as snack foods, I can definitely help you - what kind of food plan (I avoid the word "diet" LOL) are you following?
Of course - veggies and fruits are the best snacks and are 100% halal!
There is also this great website where you can type in basically any food and it will tell you if it's halal or haram. For example, even french fries at McD are haram because they put meat flavoring on them, sick! Anyway, it has tons of great info here:
http://www.muslimconsumergroup.com/