That's good if you already decided to stop smoking.
You need to plan for this, meaning don't try and just stop with "will" power alone, do some research on items that can help you with nicotine withdrawal issues, things like nicotine patches, VAPE machines, local remedies, even your diet and food intake can help.
Once you know or have some of these items to help you give up, choose a date to start stopping smoking, a date where you will have no other stress around you and give it a try.
Don't worry if you stop smoking for a few days but go back to smoking cigs again, just choose another date to try again.
Keep trying and trying and with enough help and "will" power plus your items from above I am sure you can do this 😃