The first thing you will see is a witch hut and if you are (un)lucky an evil witch. These kind of seeds are quite rare but they sure does exist. However, this seed is probably one of the best ones if you want to find one instantly at spawn.
You literally just have to spawn to find the witch hut. It will be in front of you so it is impossible to miss. Make sure to set difficulty to max before entering the seed to enable to chance of a witch to spawn. Sometimes the witch won’t spawn, but just re-enter it until it spawns, in case you want it to spawn. As usual the witch hut is a big swamp biome. The spawn is close to another biome which consist mostly of grassland and some forests.