You could start by learning basics through online courses and tutorials. But this path lacks of passion. Why don't you think of a small project you could use by yourself. Just start coding your own website with a small CMS. And then, your best friend is Google. Whenever you don't know how to start, how to get further or how to solve a problem. Use specific forums or Google it. Stackoverflow is a very good address.
The most important part is to start and to get going. You can do this by setting a high goal and break it down into small subgoals and milestones. Then just try to stick with it... at least until you have an idea you're more excited about - just switch and you will learn something new. But be careful - getting things done/finished is an important habit. So perhaps you should just start by writing really small scripts and project. Just try to accomplish something and the rest will come.