If you see a tab thats labeled "1"...glue it on the edge thats labeled "1". It's a fun puzzle! Just start going at it. Low temp glue guns work fantastically on this by the way, they set in seconds (although that could be a bane if you suck at lining things up).
Easiest way to get started is just grab a piece, check if any tabs and edges line up on that piece itself, glue that together, put it aside, grab another piece. After a while when things start taking their shapes, its easier to tell what goes where and you can look for numbers much easier.