Take it easy, patience is key for sustainable weight loss. As a beginner 3x workouts a week are good.

Be sure to make a training plan you can use for orientation. Cardio is great for burning calories, but don’t underestimate the power of muscle training. Building muscles will help shape your body and you’ll lose a lot of calories on the long term. Do not be afraid of gaining “too much muscles”, that is not happening within a couple of months.

Best would be a full body workout, splitting muscle groups is not recommended for beginners who work out 3x a week. Start with the machines, they are relatively easy to use and to adjust, there is less danger of wrong movements.
Challenge yourself, but don’t overdo it, otherwise you can hurt yourself seriously (joints etc.).
Do not forget a warm-up, 10-15 minutes of whatever machine you like (bike, treadmill etc.). Finish with a 30 minutes cardio session if you are serious.

That’s the part in the gym.

For weight loss the most important thing is your diet. No need for protein shakes or meat the whole day, just don’t eat over your budget. Maybe you have already tried this and you are frustrated because it didn’t have the effects you expected - don’t worry, the gym will accelerate this. Eat something not too heavy after workout, ideally protein/fats instead of carbs.

The third aspect is sleep. Your body will regenerate during your sleep so it is super important. Try do get your 8 hours or whatever amount you need.

Last advice is again patience. Success will only come from continuity, not 2 weeks but several months. 1-2 pounds per week is already great and sutainable and if you watch out for workout, nutrition, sleep, it will for sure happen.

You got this!

Edit: As others have said, you cannot target a region for weight loss. However in my experience there are regions where you first start to gain weight and also lose weight. For people born as biological man this is often face and belly.