It's not perfect, no, but I feel like you can identify feminine words based on their endings alone in 90% of cases, and if you can use a few general rules to make masculine/neuter better than a 50-50 guess, you're already right more often than you're wrong. Maybe even 75% with no rote menorization whatsoever

Edit: I actually just read masculine is about 2x as common as other genders, so always guessing masculine should take you to 50% alone