Honestly the best way to do it is to just jump in with both feet.
I started out like you just. All I knew when I first started was the treble crochet stitch. I youtubed tutorials and went from there. It does get easier the more you do.
I've up-ed my skills over the past two years and am fairly confidant that I can take on any pattern.
Just stick with it, trial and error and you"ll do just fine