First off, you don't need a pressure canner for pickled okra--waterbath will do quite well for all pickled veggies.
Your local extension office has all the info you need for canning--I work for Extension in Missouri, and we do a canning class every year or two, so you might be able to find one in your area.
Lots of experienced canners here, so feel free to ask questions.
Put the exploding pressure cooker image right out of your head. New ones have multiple safety features built right in.
Follow your directions step by step--the Ball books are great--and you will be the proud creator of jar after jar of jewel toned veggies! You won't want to put them away in the cabinet--you will leave them on the counter as art!!