Any beer can be a nitro beer. But I would use it mainly on dark beers, For a recipe here is a dark mild 6 lbs of maris otter 1 lb of crystal 40 8 oz of crystal 120 and 3 oz of pale chocolate. 1 oz of east kent goldings hops at 60 minutes. Mash at 154 degrees. I used 1318 london ale yeast. With this small beer no starter is needed. Now this is assuming you have a system to keg with that you can add a nitro bottle and nitro tap to.
I had a cream ale on nitro once. It was really good.
I'm just getting my parts for nitro together. I'm going to try the cream ale eventually, but in order to learn what I'm doing I'm going to start with a Guinness clone. I think I'll get a better baseline to know what is happening.