There are many books you can start with and many more books to learn, when you realize how little you know. However, one example is 'Pressure Vessel Design Manual' by Dennis Moss, who started the preface with the following words:
Designers of pressure vessels and related equipment frequently have design information scattered among numerous books, periodicals, journals, and old notes. Then, when faced with a particular problem, they spend hours researching its solution only to discover the execution may have been rather simple. This book can eliminate those hours of research by providing a step-by-step approach to the problems most frequently encountered in the design of pressure vessels.
Let's just say that Moss is an optimist believing that his book would answer 'most of the frequently encountered problems'
Everything called pressure vessel design revolves around one only issue;- the safety of operating an equipment capable of extensive damage to property and human life. All starts with the ability of the design engineer to follow rules and develop an acute sense of responsibility for the design he produces. Just remember that there is no room for mistakes, that other people might pay with their life for your errors.
Good luck with your endeavour,
Cheers,
gr2vessels