Sounds like a great progress indeed! Just take it step by step. Don't start adding the new habits too quickly, because each new habit, actually shakes your curr

Sounds like a great progress indeed! Just take it step by step. Don't start adding the new habits too quickly, because each new habit, actually shakes your current routine a bit, because you're learning something new and your brain is taken from automaticity mode that your habits bring you into. So don't rush, do the home cooking and cold showers and exercise, but don't add the swimming pool yet, because you will be less likely to keep up and as a result skip few days. Skipping will bring out negative emotions and an urge for escapism and you'll be a lot more likely to revert to your bad habit - weed. Take it slow and enjoy the ride.