In terms of cricket specifics you want to build up cardio and core strength. Personally I'd be running 5x a week, because LISS cardio burns more calories than HIIT does because you can go for longer doing LISS and often people don't do HIIT right and therefore don't get the benefit. You want to be doing an absolute minimum of 20 mins cardio daily, be that walking uphill running climbing stairs etc etc. In terms of working out, t25 is decent from what I heard. Kettlebells are also pretty good for a full body workout, if I were you I'd get to a gym and focus on compound movements - squat bench deadlift, as they recruit the most muscle groups and therefore give you the best bang for your buck. There are plenty of free programs on the Internet which are fairly good, but also if you join a gym often they will give you a personal exercise plan free. May be worth looking into.
With regards to diet. There is absolutely no scientific evidence to suggest that veganism is a cleaner or healthier way of living. If anything the science suggests that vegan diets are lacking in protein. So don't worry if you don't want to go vegan.
Ultimately its calories in vs calories out. If you burn more than you eat, you'll get leaner and vice versa.
I will say however, try to stick to clean foods such as lean protein lots of veg and complex carbs such as brown rice. This will help you lower your caloric intake too.