Dont go throw yourself into 5 gym sessions a week because that's like throwing a child who's never swam before in the deep end. Go once or twice or get a PT, join a bootcamp, test the water. Get the fundamentals right first like sleep, hydration, fruit and veg and move as much as possible. If you take on board all of this you will begin to be more patient with your expectations of results and appreciate what may seem as the small things but trust me they have the biggest benefits.