Wait, you want to lose 2 stone in one month? That's impossible. Eat right and train regularly and you will lose weight consistently and reach 2 stone in maybe 6 months but most likely a lot longer.

Weights. Start off twice a week. 5 sets of 10 reps. 2 warm up sets and 3 working sets. Full body each time.
1)
Squats
Pull Ups 3 x Max reps
Dips
Bi Curl
*Burpees*

2)
Deadlifts
Pull-ups 3 x Max reps
Shoulder press
French press
*burpees*

Add in some abs and this is more than enough for weight training in your first few months. Add cardio at least 4 times a week with the aim to slug through it rather than going particularly hard or progressing too fast.

Stick to cardio for a month or two, then add weights. Keep things simple. But remember that diet is king. Your diet is the most important thing for losing weight.