Long Term Smoker who Quit ? Hows life now and how did you Quit.

Been smoking for 5 years—at least 2 packs a day, sometimes more, along with multiple Mary Jane's daily. Lately, the effects are catching up—breathlessness, fatigue, and just feeling off all the time. I know I need to stop, but it feels impossible. If you’ve been a heavy smoker and managed to quit or recover, how did you do it? How long did it take for your body to feel normal again? Any real experiences, tips, or just motivation would help. Would appreciate hearing from those who’ve been through it!