I have one cactus for about 5 years now, and since then it grew from about 3 cm to considerable size. I am watering it every 20 days and it is not exposed to direct sunlight. But I was always puzzled should it look like this , I have never seen similar cactus because it has long branches and it looks to me that it cannot stand straight by itself.
When I water it the branches tend to straighten and it starts to grow. And then it curls again until I water it again.
20 days ago I took a branch that curled and fell off and poke it directly into the soil for cacti, keep it in the direct sun and water it when the soil is dry, since it was sunny I water it every 5 days.
So after 20 days it went from this:
So I am not sure what to do next, when should I move it to the bigger pot, how often to water it, to not kill it, is 5 days too often, and can I avoid having it grow and look like the bigger one on the first picture, since it looks it grows in all directions and doesn't look pretty.