WillC said: A soilless, peat-based potting mix is a better bet. But there is another important consideration.
If you use a pot that is too large, the potting mix will stay damp for too long and suffocate the new roots. The pot should be just barely large enough to accommodate the roots and just enough potting mix to barely cover them. After the new roots fill the pot, the plant can be stepped up to a pot one size larger. Don't rush the process.
WillC said:Based on your description, a 6-inch diameter pot is probably about right. It looks like it is in a 10-inch pot now. Keep the roots snug in the pot so the soil dries out sooner.
The stems may need a stake for support initially until the roots fill the pot sufficiently for it to remain upright. You may also want to insert a stake permanently to support it as it grows taller.
When potted and watered properly, the top quarter of the soil should get almost dry to the touch after about a week.