Bell peppers are the most difficult pepper to grow but usually respond well to good conditions.
First realize that peppers in general are very SLOW starting. Tomatoes and zucchini are the hares to the peppers Tortoise.
Your containers should be adequate and peppers love heat so you should be fine in that area.
Peppers can be overwatered , so be careful on that front. Assuming you have a good growing mix you should be ok.
