cardio or weights??

My suggestion is that you continue to do both, and be very focused on counting your calories to maintain a deficit that targets 1-2 pounds of weight loss per week.

I also say go with both. Weight loss has more to do with eating at a proper deficit. Cardio is for cardiovascular health, and weights are to retain lean muscle mass and increase strength.

What is the issue with your hand? Is it an injury, or something else? Is is permanent, or is it something that can improve?

I vote both. But understand that diet does WAY more to achieve weight loss than any form of exercise. And as you build muscle while losing fat (and you can achieve that because of your specific body composition), you will hit plateaus when you're building muscle, shedding fat, dropping clothing sizes but not losing weight. It's all good because you're still shredding fat.

If you can afford it, go get a starting DEXA scan to see what you lean mass is vs. fat mass. Then go back in six months to see your progress. I found it very motivating when I was stuck on a very long term plateau. I had added muscle and bone density, while losing fat, and dropped 4 sizes, but the scale would not budge. For 18 months!

As others have said diet is more important than either exercise. I dropped 85 pounds last year without touching a weight. I did a ton of cardio and that absolutely helped allot but counting my calories are what I give 75 percent of the credit to. The best route imo is lots of cardio and some weight training, you won't build and muscle lifting your just focusing on keeping the muscle you have but calorie deficit is all that's important. If you eat more run more, on days you don't eat much it's a good ha but, but not as necessary to get that workout in.

I lost 40kg just from weights.

I lost the other 20 from weights and cardio.

I can't give you a like for like comparison, but both aid weight loss. One supports muscle retention, the other focuses on losing fat.

Do both.

Your diet is going to have a far more profound impact on weight management. As a matter of general fitness both cardio and resistance training are important...cardiovascular exercise for your cardiovascular health and resistance training to build a strong body.

Diet for weight management, exercise for fitness and general well being.

I cycle anywhere from 80-100 miles + per week...I lift 3x per week...I walk my dog regularly and as a family we're always out and about being recreationally active. I have lost weight, maintained weight, and gained weight doing all of those things, with the difference in my weight being how much I was eating, not my exercise.

While diet and exercise generally work in conjunction with each other, try to start thinking about them as separate things...exercise for you health and well being and eat at a level appropriate to that activity level to manage weight.