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This actually looks quite normal, and the pepper seems to be beginning to ripen.

https://www.gardeningknowhow.com/edible/vegetables/pepper/harvesting-peppers.htm

These links will help you.

https://www.gardeningknowhow.com/edible/vegetables/pepper/drying-hot-peppers.htm
https://www.wikihow.com/Dry-Chilies

Ah, I do have a solution! Oddly enough, it has to do with peppers... Make a preparation by boiling Hot peppers in a small amount of water. Cut them into large chunks so that you can easily take them out. Spray the plants with this spicy water.

Alternatively, you can use garlic oil, rosemary oil, or any other strong scented oils.

Here is an article for more information: https://www.gardeningknowhow.com/special/organic/natural-home-pesticides-organic-garden-pest-control.htm

Many different pepper types have different requirements. The hotter the pepper, the longer season required to mature. Peppers can survive down to about 50 degrees just fine, but will slow down growth at this point. Freezing temperatures will kill them. There is more to know than I could possibly explain here, But here is a very comprehensive collection of articles to get you started: https://www.gardeningknowhow.com/edible/vegetables/pepper/

That is a very small container! I would recommend at least an 8 litre conrainer for them to grow and fruit properly. I would add dolomitic lime to the soil. If you want fruit from it, I would stop feeding miracle grow. This is keeping fruit from forming. Use something high in phosphorus and potassium. MOST IMPORTANTLY move them to a larger container. They will not thrive where they are. Here is an article with more information: https://www.gardeningknowhow.com/edible/vegetables/pepper/growing-peppers.htm

Depending on the wattage, I would recommend drying them somewhere dark and cool. The light could produce too much ultraviolet if it is a conventional gas lit bulb. Alternatively, if it is LED instead, then I might be inclined to say that you can dry them under this. Otherwise, I believe it will be too much for the seeds. If they are not ripe yet, then I would say they might not mature fully, but you can always try. Plants never cease to amaze me.