Should I wait until there have grown a few leaves or just transplant it right away? On the picture you can see that the top part has turn brown. Is that normal? Should I not leave my plant in direct sunlight?
if you are potting it.. you might get better direction in the house plant forum ...
if mother earth .. dont.. not yet.. pot it..and grow some dirt roots.. as compared to water roots ... and plant it in fall ... to learn about such.. see above ...
a potted tree .. NEVER goes in full sun.. or you might bake the roots in a black pot ... full bright shade ..
i am surprised you found nothing on google about such????
My experience flies in the face of everything considered 'right' about growing avocado trees. For one thing, I never bother doing the toothpick thing--I just drop them in a bowl of water and wait. Once they crack and there's growth showing, off they go to a pot filled with potting soil--in full sun. Or not. Sometimes I just stick them in the ground. Do they grow? Why, yes, they do! It's hard to tell from this picture, but the avocado tree is about five feet tall; I have pics of it when it was a wee seedling back in 2009--in a pot in full sun. :)
Do note that I'm in the San Gabriel Valley area of Los Angeles. We have no winter to speak of. My entire backyard is in full sun all day--full, HOT sun. We've been right at 100 for the last few days, and we broke numerous records this 'winter' with 90+ degree days.