If you read all the answers here, you'll see that you're not going to get a clear answer.
Doctors do not agree... you can find some who swear by a vegetarian diet, others who swear my a very low carb, meat based diet, and you'll find people who thrive on both of these, and who swear by their particular choice.
There's lots of low-fat information at this website and in most of the diet books written in the last 40 years (the years of the growing obesity epidemic.)
If you want the actual science behind low-carb eating, read "The Art and Science of Low Carbohydrate Living (aimed at doctors, but not hard to read), and/or Why We Get Fat by Gary Taubes.
A low-fat, vegetarian diet (started in the 70's, followed for twenty some years) made me fat and sick. It does NOT do that for everybody. I really liked eating that way, but my body didn't respond well.
You'll have to find out what works for you personally. Read all the science you can manage, pick a plan, stick with it for a while, and see how it works. How is your blood pressure, your energy level, your weight. If it's not working after a good try, then make some changes.
Don't just jump in without getting some information first, though. If you decide to cut your carbs, and you don't get all the extra salt and minerals you need, you'll likely have a pretty rough time at the start.
Sorry there's not an easier answer.