Fuseki (opening) doesn't matter much for most players. AI confirmed that a wide variety of openings, even weird ones far removed from the usual credo, work very well. At worst you may lose a couple points in doing so, but unless you play at a high level that's negligible and will never be the reason you lost.
Joseki (corner sequences) is also not that important, and certainly not something any beginner should spend time on. In fact, a common Go proverb is to "learn Joseki and lose two stones" (get weaker). We often see beginners learning Joseki, getting confused when their opponent doesn't follow the sequence they have in mind and ultimately blundering their corner. Or they ask "how to punish that?", without realizing that many moves are good even if they are not Joseki, and there's nothing to punish.
Fuseki (opening) doesn't matter much for most players. AI confirmed that a wide variety of openings, even weird ones far removed from the usual credo, work very well. At worst you may lose a couple points in doing so, but unless you play at a high level that's negligible and will never be the reason you lost.
Joseki (corner sequences) is also not that important, and certainly not something any beginner should spend time on. In fact, a common Go proverb is to "learn Joseki and lose two stones" (get weaker). We often see beginners learning Joseki, getting confused when their opponent doesn't follow the sequence they have in mind and ultimately blundering their corner. Or they ask "how to punish that?", without realizing that many moves are good even if they are not Joseki, and there's nothing to punish.