This is how the starter looked at the end of the 6th day... just after a few hours of some warmth!
Today I already used it for baking bread and it turned out excellent! The starter is really bubbling and active! Very healthy indeed :D
According to sourdolady:Once your wild yeast is growing, the character and flavor will improve if you continue to give it daily feedings and keep it at room temperature for a couple of weeks longer.
After that time, it should be kept in the refrigerator between uses/feedings.
I will be making two more batches of bread this week using this new starter so it will get a lot of feedings.