i have finished the turkish tree in a month
What can you do after finishing the tree?
Well you can do the reverse, so English for Turkish speakers. You can also immerse yourself by listening to music, watching youtube videos and reading. You are lucky, there are many turkish soap operas so you will find a lot of TV shows, movies etc. Practice the grammar with exercices online and the vocabulary with Memrise. Try to write some short texts in Turkish. Find someone to practice with (a native speaker would be great).
I think that's all I have :)