Hot peppers are rated on their heat intensity using the Scoville Scale.
Sweet bell pepper is rated 0.
The Carolina Reaper is rated 1,400,000 - 2,200,000.
Place the seed tray on a heat mat and cover with a plastic dome to keep the humidity high until the seeds germinate, and place underneath a grow light. Remove the dome once the seeds germinate.
Be sure to read the seed packet your pepper seed comes in for best practices, and be sure to know when your last frost date is, so you can time things properly.