Start moving
Keep every run gentle. The goal is to finish feeling like you could have done a little more.
1 min run / 90 sec walk × 8
Start with a 5-minute brisk walk. Alternate 1 minute of easy running with 90 seconds walking for 8 rounds, then walk 5 minutes to cool down.
Repeat the pattern
Use the same 1 minute run / 90 second walk structure. Let familiarity, not speed, make it easier.
Finish week one calmly
Repeat the same session. If it still feels hard, that is normal — you are building the habit before you build endurance.