Hi, I'm currently going through the same thing you are, although I'm a few weeks ahead now, I ve wanted to shift some excess weight for a while it seems the last 4 years of my life ive been on diets that just fail and fail and fail, why? like of will power I guess.
Firstly the key to getting fit starts in the mind, fit mind fit body, and also if your in the right mind zone when you workout not only will it be more effective but you will be less likely to give up.
Drink LOTS of water, it will rehydrate your body and will often curb those hunger pangs, you need around 8 pints a day. Is it at all possible for you to join a gym?
Buy yourself one of these

Its called a speed rope and costs about 3.99 from any sports shop I think even argos sell it (dont get a plain skipping rope) I bought one and it has already done wonders for me, if you can skip for even 20 mins you will around 400 calories, and you can do it in your own home, stick on a film or put some music on and try it, I didn't even know how to skip when I got one, now I'm a regular rocky

. Also if you think you acnt bear going for long jogs or anything try this other option, 10 minutes, go for a jog for 10 minutes but bring your speed rope with you in your pocket, when your knackered sit down for 5 mins then pull out the rope and skip for 10 mins, rest for 5 then jog 10 mins back home, it shouldnt feel overly stressful and when you get back you can look back on what you just odne and your heart will be thankful!

Also I'd suggest getting a monthly magazine called 'Men's Health' It is packed full of useful tips for getting fit, improving mental well being etc, it isn't solely a fitness magazine or anything like that, just think of it as FHM only a bit less girls, more on looking after yourself.
Good Luck, hope I've helped, like I said I'm going through a similar thing like you are and I recently almost gave in but this thread has reassured me, if you wanna chat about anything send us a PM
Take it easy