Logic is common to all programming languages. Everything else is syntax and knowing what functions or utilities you can capitalize on. No matter how complex things seem under the hood it's only one instruction at a time that is being processed. Speed and memory make it seem like multitasking. It's as simple as "If this, then that". Once you get the foundations of logic down, you're good to go. Everything else is experience and time takes care of that. Good luck and have fun. As far as confidence goes my mantra throughout life, especially when faced with complex situations is a derisive "How hard can this be?", while plodding forward.