Doing ‘nothing much’ while stoned can be good fun, but is miserable sober. Youre probably not going to feel happy without alcohol / thc if you’re just remove them and don’t change your lifestyle. Think about activities that weed doesn’t go that well with and try and get into those. That’s why ‘sober’ people are often the folks going for early morning runs or playing in sports clubs, or their taking on lots of projects and creating /renovating / etc. What interests you is personal, but reading, gardening, outdoor walks, climbing, community activitivism, learning a language, etc are all good choice.