A few questions regarding conversions and almonds

I’ve been visiting a blog site that talks about low-carbing and has some pretty good looking recipes that I’d like to try. Unfortunately for me, everything is in grams and being the math dummy that I am it would take me forever to convert everything in a recipe over to ounces, cups, etc. Any tricks for learning how to convert those recipe measurements that would be quick and easy?

Also, when a recipe calls for ground almonds, that is not the same as almond flour is it? Is almond meal a whole different thing too? Are those almonds called for in recipes (or sometimes pecans) unsalted and unroasted? And where would one find almond flour?

Thanks for any help.:)