Welcome to Geekhack!
Beware that something that is not quick and easy it often very expensive. Sometimes $500+ depending on what you go for and how much assembly is required.
The results can be fantastic though, and a well-made mechanical keyboard can last for many years, so spending a little time to get it right the first time can be time well spent.
Given the huge amount of knowledge around here, please ask questions, and have a look at the
simple questions thread, which is a wealth of obscure information.