How to master masculine and feminine in French

These endings are feminine.
-tion, as in la question and la conversation.
-sion, as in la passion and la discussion.
-te, as in la liberte and la qualite.
-ette, as in la baguette and la chaussette.

These endings are masculine.
-ment, as in le moment and le logement.
-age, as in le voyage and le village.
-eau, as in le chateau and le bateau.
-isme, as in le tourisme and l'optimisme.

A few words break the pattern.
La page and l'image are feminine, even though they end in -age.
L'eau and la peau are feminine too.
L'ete is masculine, even though it ends in -te.

That's a short list of exceptions, and it's a far better deal than guessing at every word.

When you meet a new word, put it in your Cahier with an adjective.

Cahier is just French for notebook.

Un petit village.
Une petite baguette.
Un grand voyage.
Une grande liberte.

The adjective changes with the word, so you see and hear the gender every time you read it back.
That sticks far better than a rule you're trying to remember.