Yeah I would wait until the plant gets bigger. It is usually done between the 3-5th node with full leaf sets ( I don't like the 3rd because plant is small and that stresses it) with that said, you got a little more to go before topping. let it grow and get up to like the 5th node with full leaves, so about the 6-8 node from bottom. That is not a definite but pretty close. once it gets up there and the plant is healthy you can top at the 5th with full leaves or the 10th all about how big and what you want the plant to look like. they are looking really good keep up the great work👍 hope this help you if you have any other ?'s don't hesitate to ask😊