When you print, if you print on 120 gram paper [called cardstock], you will get a good sturdy quality.

Cut on the solid lines, fold on the dotted lines.

Before laminating, cut on the solid lines, and FOLD all the dotted lines.  It is important to pre-fold before laminating as once you laminate, it is hard to get it to fold at the right place, but if you pre-fold before laminating, it works okay.

[I FORGOT TO PRE-FOLD :-0 ]
Don't panic! If you take a cutter & make tiny 3 mm incisions along the dotted lines about 3/4 cm apart, then try to fold, that makes the fold work at the designated place.