First things first. Your soil looks great. That being said, you have way too much of it. There aren't enough roots to absorb all the water in that large pot. I had a 3-4 year old established tree in the same pot. You're more likely to have root rot issues if you keep it in there at this point. I wouldn't go larger than a 2 gallon pot for what you have.
The plant seller usually removes all of the leaves before shipping. My advice would be to remove all of the larger leaves, so the cutting can focus on establishing a root system instead spending all of its energy on perking up all those leaves. The wrinkles will go away in time with the proper conditions and care.
1- repot in smaller pot. Clay pots are better choices IMO. They absorb excess water from the soil better than plastic.
2- remove the large leaves. Keep only the new leaf claws.
3- water thoroughly. Allow the soil to dry out before watering again.
4- give plenty of light and heat. A bright window may not suffice. It needs sun and warmth. At least 4-6 hours of morning sun is preferred while it is establishing. Then you can increase amount once it is established. You will know it has good roots when it starts growing more mature leaves.
Good luck!
