Plugin Design: NEW Coder in need of help

Hello! I've been with the minecraft community for a long time now, building and playing on multiple minecraft servers even owning a few. I can consider myself a decently skilled builder and plugin set up for server but I feel it has come to that time where I have a idea for a plugin and I don't know where to start to make one besides some basic tutorials and I still remain confused. I realized I need experience with Java and I can't seem to find out how to get taught coding so I can make a plugin I can call my own. PLEASE can someone help me learn how to code a plugin, I would offer up my idea for a plugin if I must but I wish to have a plugin I can call my own.