Going straight from abstinence to WW will mean your metabolism does not have a chance to rebalance itself and you will likley gain weight to start with. Your metabolism has slowed right down and if you suddenly give it lots of food it won't be able to metabolise it properly. Your glycogen will also refill and you will likely see a gain from that too, about the same amount as you lost the first week, (this happens gradually on RTM and you hardly notice it).
You also won't have the advantage of retraining your mind and body in a new way of eating.
I know some people have said they had no gain, but it is best to be prepared for it.
RTM gradually adds food back in which allows your metabolism to gradually rise, and you learn to eat again in a whole new way. It really is a very important part of the programme and I would strongly advise against not doing it. You will read that most people who haven't done it have gone on to regain most/all of their weight and quite often more.
If you want to lose more but really don't want to do it on abstinence then I would suggest RTM first, then you can either just cut back a bit (which I have actually found pretty easy, RTM really does guide you into a good healthy balanced way of eating) or WW (but why spend out on WW when you can get free weigh ins and counselling from LL once you have finished RTM, and guidance on losing by cutting down).
You will still likely lose a good bit on RTM too, anything from 7lbs to a stone (some have lost more than that).
Abstinence is hard but so worth it.
I personally found WW such a struggle, .5lb here, 1lb there, some times lucky to get a 2.5. You won't lose on WW like you can with LL.
I think it is just your chatterbox you need to get under control. Everyone on LL misses food, but it is all part of the retraining. I guess it depends if you want to just lose weight or if you really want to change the rest of your life.