Be careful about who and how broadly you share your desire to be a missionary. Of first importance, though you are no doubt excited about this development, there are people in the world who would not be happy about it. Governments of countries closed to normal Christian ministry among their people know how to research you on social media and refuse you entry. It has happened. So, you must be "wise as a serpent and harmless as a dove."
Secondly, your calling will take some considerable time to work out and gain the training, experience, and relationships needed to make your entry in missions work fruitful, faithful, and effective. Don't think that you will go charging across the ocean right away or that everybody owes you full support and backing just on your say-so. That is, unless you are determined to be arrogant enough to impose your desire on others enough to get over to someplace cross-culturally ASAP on your timetable. If that is the case, we'll see you back home crashed-and-burned just as quickly.