Welcome to the site.
Here is a good place to start as far as a routine:
Beginner Routine
You have some training experience but switch from machine to free weight if possible. It may seem like machines and weights are the same thing but trust me; they're not.
As far as diet, post up what would be a normal day and week of eating. This way we can look at what you are consuming and make suggestions. Understand something about women and their anatomy, women are genetically engineered to have extra fat depostits in their midsections. Nothing you can do about the genetics so you may never be able to get rid of the "belly bump". Very few women I have met have been able to achieve that sort of look. We have 2 ladies on here that have awesome abs! Jennyd and CubanChic might pop in to give you some great advice! These ladies are awesome and full of knowledge and support.