Firstly, kudos on losing 12 kgs!

It depends on what sort of physique you want in the end. If you wish a slim/average one with muscle tone, you could probably continue with just cardio and moderately light weights and that's what you will eventually get. On the other hand if you want bigger muscles, you need to progressively increase the weight that you lift. If you don't have a trainer or spotting buddy use machines to be safer.