We're all different with our own miles on the clock and various injuries, but in general follow the below and you will be on the right track.
1.Weight loss is 100% about diet, doing HIT 5 x a week won't make you lose weight if your diet is rubbish, but it will get you injured.
One diet doesn't suit everyone, cut out the snack food and go from there, the body coach and others offer diets to follow but always remember its their business and what works for one may not work for another. Some people adapt really well to fasting, but some don't.
2. Strength/Fitness - You only need to be strong/fit to play cricket (this thread) and get through life, not run marathons (if you do you need a marathon coach). HIT workouts are fine for short periods, but if too much of these and you will get injured, you body can only be stressed for some long before something will break down. When training, always look to come out of a session having added to what you have, not exhausted (except Short periods of HIT if you desire), your body will thank you for it.
My own 2 cents.....I use KB's pretty much daily (and body weight drills) for mobility work (I'm 40) and strengthening/conditioning. Used correctly they are great, nothing works better for cricket IMHO (I've trained pretty much every system over the last 20 years), but there are other ways to train.