I have always found Spring to be the best time of year to transfer your plants into larger pots, as they will be starting into their growth seasons now. Most indoor plants grow year round, but they do seem to slow down in the winter months. As the sun is getting warmer and the days are getting longer, the plants will grow their most in the Spring and Summer months. I think April is the month to do repotting, as this growth season will just be starting and the roots will be expanding. I wouldn't recommend doing this in the winter, as your plant may not adjust to the larger pot well.
At this point, the new pot that you are planning to place your plant into should be partially filled with dirt. Fill it up to a height that would be good for the bottom of your plant to rest on, to fit into the new pot nicely.
Now take your potting soil and fill in the pot with enough dirt to hold the plant in steady. I have left the nut exposed a little bit at the top of the soil, as this is still a young tree and I want it to grow easily. I want to wait until it has a good trunk, before I cover over the nut with soil completely.
Well this is turning into a long post, so I will continue tomorrow with planting the cuttings. Thanks for reading!