So, first off, welcome, we love new people around here.
As for how to get started, I’d recommend just doing a lot of reading, and then as you get an idea, look for specific things to build your skills. Before you know it, these larger projects that seemed so complicated will be not so intimidating. It’s all a matter of just taking small steps, learning one type of thing at a time.
Here’s a quick guide I made for some common questions. I think you’ll probably find a lot of the topics quite useful.
Read through them and click through to other topics, and just keep going and going, it’s a learning curve but it’s really fun 