HIIT cardio is the most effective for fat-burning, and it's actually really easy to do. Choose a cardio machine, a piece of equipment like a Kettlebell, or just use your bodyweight. The point is to do intervals of movement as intensely as you can. At first, go for something like 30 seconds of work followed by one minute of rest. Do these intervals for 20 minutes. As you get better, you can increase the work time and decrease the rest time.
You don’t have to lift hundreds of pounds on every exercise like a guy might, but you do have to lift weights that are equally challenging for YOU and continue to push yourself to progress and gradually lift heavier and heavier weights over time. This is progressive overload, and it’s a requirement for any amount of muscle to be built or any amount of progress to be made.
Complete the exercises in each workout as Straight Sets. For example, you'll do one set of leg presses, rest for 30 seconds, do a second set, rest, do the third set. Then, move on to the next exercise. You'll complete all movements in both workouts this way. Complete 12 reps of all movements for 3 sets each, and rest for 30 seconds in between each set. Choose a weight load where the last two reps of every set are extra hard, where you wouldn't be able to do a 13th rep. You may find that you increase the weight load for each set while keeping the 12 reps for all three sets.