Looks like those few changes you have made are a good place to start.
I originally started on Lite n easy but it can be expensive and all of the food is ordinary stuff that you could easily do yourself with some planning which is what I do now.
There are a few basics you can change:
Water - 2lts + per day
Lean meat (avoid anything too fatty or processed)
Low fat Dairy
Wholemeal/Grain breads, pasta and brown rice
Plenty of fresh veges and legumes
Fruit but not too much
Nuts and seeds (watch the serving size here)
In general keep an eye on your sugar and fat intake not just the visible ones like sugar with coffee and on cereal or oil used for cooking but the ones not so visible so some label reading on products is handy.
Nothing too special there and probably nothing you haven't heard before. You may even find it better to not change everything at once but slowly ease into it letting your body feel the benefits and train your taste buds to enjoy the foods.
Also getting your body moving is a good thing too but start of slowly and ease into it if you haven't been doing much or any exercise.
Have a good read of everything on the home page
as there is a wealth of info to help with all of this.
Hope this helps a little and all the best. Let us know how you go.