Right on!
I understand that aerobics are need, but, people need to also understand how important weight training is to not just weight loss, but, keeping weight off as well.
The more muscle you have on your body--the more calories you burn--even at rest--so it will be easier for you to lose weight--and then, maybe even more importantly, to maintain your weight loss.
Plus, as an added bonus, you will love the way your body looks--weight training can help you go from someone who loses weight, but, just looks like a smaller version of themselves--to someone who looks completely different--in a positive way.