1 - It’s actually quite hard to recommend either v3.0 or Black Edition for weight loss. The main reason being that we deem most weight and fat loss to be mainly due to calorie deficit and we suggest a meal of 400 calories for both v3.0 and Black Edition. Therefore, you should choose whether you would like more carbs or more protein in your diet. Some people prefer more carbs to give them more energy but some people prefer more protein for growth and repair. It is entirely your choice!
Feel free to check out the following links, which might help you make your decision!
You want to be sure that you are consuming enough energy to fuel you throughout the day and creating habits that you are happy to maintain! This calorie calculator will help you work out how many calories you require: calorie calculator here. This a great place to start but of course, this is just an estimation of needs and it may need to be adjusted as you find what works best for you.
2 - Absolutely! Everyone’s bodies are different but I find one of the main benefits of Huel as a meal is that it keeps me full for a prolonged period of time, reducing the need to snack.
3 - This is entirely your choice. I would recommend calculating what you consume over a week or so and take an average. Then, reduce by 500kcal as you mentioned your goal was to lose weight. MyFitnessPal tends to be the best app for tracking calories based on my own experiences.
Hope this helps! Always happy to answer more questions you may have.