yeah it's really tough at the start and it does feel very overwhelming
i guess there is no shortcut to it but a lot of trial and error
set smaller goals, split stuff into simple task, with time you'll feel progress
good luck ^^

if you meant that you're still learning godot and get sidetracked by figuring out the different features then:
make a simple learning project that you will complete. something common. something you can plan out in a simple todo list, so you know you can make it and/or it won't take years to finish

hey I'm no expert by any means nor I have published anything, but the furthest I've went with making a game was when I had everything planned out in a sketchbook, like even some pseudo code.
that meant I always knew what to do next and thus not get lost.