What you need to do is plant it in your garden asap or it has little chance of survival. You can plant as long as the ground there isnt frozen. They make poor houseplants, needing very full sunlight, humidity, moist soil & they get spider mites very easily. Give it a shower once a week. You dont need to prune it til next year if you're planting outside. Even then just a light trimming is fine for minis. Make sure the middle is not crowded to prevent disease. You may need to spray with fungicide in cases of mildew, blackspot etc. Minis are quite hardy. Keep well watered. Good luck with your new plant!

Jen