I've been smoke-free for about 10 months now. Although I use a small vape pen now, but it's much better and cheaper than cigs.
The most difficult for me, was breaking the routine; cigarette in the morning with a coffee, fag breaks at work etc. Try and find something to replace the routine and it will slowly become easier.
Also, the quit smoking apps are good to track the money saved for a bit of motivation.
Youll probably find yourself snacking more - try and eat fruit, chew gum and keep yourself busy when you have cravings.
Good luck, you'll