Hi and welcome to VF!
Is your overall goal to loose weight, to become fitter or to build muscle? Depending on what you are aiming for you need to train differently. But even if you want to focus on weight loss, weight training is good. Muscles need energy and your metabolic rate will increase just to sustain the muscle tissue.
It takes a long time before you start actually putting on muscle tissue too, at first you are feeling/getting stronger by developing the signalling to/from the brain and generally getting better at using your muscles for heavier work.
So I'd say, hit the weights! (But be sure to get some help creating a good program and plan for you!)