I use Peter's Potting Soil, mainly because it's convenient and works well for me. A home made mix of peat moss and vermiculite will be less expensive. Give your peppers as much sun as possible. Watch out for aphids and spider mites. Black is good to catch sunshine and warm the roots as much as possible.
Large pots are best.
I would suggest a 7-gal. Ordinary commercial potting soil is great. Last summer, I tried to grow peppers for the first time. Now, I have heard that Eugene, OR is not pepper territory, and we did have a hot, dry summer. We started getting edible peppers in July, and ended up freezing and drying lots of peppers, that have come in very handy this winter.