Clean your gear. Sanitise everything like your beer depends on it... because it does!
Pour 2L of boiling water into fermenter. Soften your extract can in hot water (10 mins), then empty into fermenter.
Add your fermentables (about 1kg). Stir until dissolved
Top up to fermenter with water 23L mark. Boom! You've made wort!
Cool wort to 18-22°C. Take gravity reading.
Sprinkle yeast over wort.
Cover, add airlock, and place in dark spot (18-22°C). If adding hops, dry hop (chuck 'em in) on day 4.
After 5 days, check gravity. Take gravity readings on consecutive days. If they're identical and under 1.016, you're good to go!
Bottle or keg. Add carbonation drops or sugar when bottling. Wait 4 weeks (best at 3 months) or keg it for faster gratification.
You're officially a beer wizard! Drink & Brag.