im still pretty new to this game what do you mean by over wintering something
Chilli plants (in general) are perennial - in other words you can in theory keep them going year after year. However, they are frost sensitive so are easily killed off but if you bring them indoors they will get some protection. The trick though is to get them in a sort of dormant state so if you can put them somewhere cool (but not cold) and sunny spot like a south facing window ledge, reduce the watering but not totally bone dry (as sun strength drops they won't be photosynthesising as much so only need a bit of water to keep them alive), and trim back most of the leafy growth to the woody stem, they can survive winter.
In spring, repot into fresh compost and when you see new leaf buds,
gradually increase the watering. Not too much as this can do the opposite effect and many a plant will keel over - too often the British spring is a bit haphazard and can be mild earlier on then shunt back to winter just when things are getting going. If you do succeed in overwintering the plants, they are already mature so there is no need to wait for seeds to germinate and grow on. They will flower a lot earlier and be more productive than the first year.
Annums (such as peppers and cayenne type) don't always survive too well, but some do. I overwintered some Jalepeno and Hungarian Hot Wax because they never reached the flowering stage last year due to the dull weather - believe it or not, but the fresh seed sown this year flowered first but having said that, the overwintered ones do seem to have more fruit on them now. The Fresno that I've managed to overwinter twice, has masses of fruit on it but I'm not actually expecting to successfully overwinter it again as the plant looks like it is going past its best.