M'ath, zhey Mathion! We're glad to have you on board. Feel completely free to ask questions, make suggestions, try to translate things, etc. Besides me, there are users Ingsve and Qvaak, who are much more fluent than I am.
Things are slow here right now, so don't be surprised if it takes a day or two to get an answer. But there is still much for all of us to learn, both of Dothraki and Valyrian!