There are many types of chillies available, why not grow several varieties.
Sowing Seeds
Start seeds 2 or 4 to a 4 inch pot, or use a seed tray if you prefer. Place this somewhere warm, you could use a heated propagator, or a sunny windowsill.
Depending on the type of pepper it could be anywhere from 2 days to 4 weeks before the seeds germinate. The warmer they are kept the more chance they will germinate.
Transplanting
When the seedlings are large enough to handle, carefully repot them 1 plant per 4 inch pot and place them back in a sunny spot. Feed them if required, but with good potting compost this isn’t essential.
Pot the plants into grow bags or 10 inch pots just before they become rootbound.
Plant Care
Water only when the soils starts to dry out. You can apply a general or tomato feed, you could also try using chilli focus.
Note: Some people say only feeding when the soil is bone dry and the leaves have started to wilt slightly will stress the plant and make it form hotter chillies. If anyone has any information about this, let me know.
Harvesting
Harvest the fruit when unripe or when fully ripened, different types offer different heats/flavours at different stages