Cratle one in your hand very carefully. Just stick your hand(fingers) a few inches under the seedling and pull it up while holding the other in place.
Put it in soil.
Regular poting soil is fine. Organic nutes are the best. I don't suggest using chem nutes in your soil.Just make sure the ph is nutruel.Most is.
You can keep them a little smaller by topping them after the 5-6 node grows.Node is the spot where the main stock and the new branches and fan leaves grow. When you see 5-7 of those. Cut the one on the very top off. Leave the two branches below it ,to become the 2 new tops. And the plant should bush out instead of growing upward.