Everyone is overwhelmed when learning to program or even learning a new framework. This is normal. We just do our best to ignore that feeling and keep going. You will often fail and sometimes spend hours wondering why something doesn't work. But eventually it will become easier and you will be able to make cool things. Python and JavaScript are good languages for beginners (but choose one).

If you would like to contribute to Libre Software, there are other ways you can do it too. You can join some chat rooms for a specific project and help people when they have issues. You can help to document things or help translate stuff.