There is no such thing as "oomph" in animal protein. I have been vegetarian for over 30 years and get all the "oomph" I need from dairy and vegetable protein.
However whether the OP goes vegetarian or not he will still need to eat a sensible diet if he wants to loose weight. There are, sadly, plenty of obese vegetarians about.
There are plenty of good vegetarian cookbooks you can consult, but you could start with pasta or egg dishes. Also try eating bananas or dried fruit with nuts, instead of chocolate, if you need an energy boost. Similarly try dilute fruit juice instead of sugar filled energy drinks.