IWTL How to improve communication skills and communicate effectively? How to articulate thoughts and in clear and concise way?

Hi, I'm in my late 20s and still struggle articulating my thoughts in a clear and concise way. I always stumble with words and cannot make it sense with a sentence. I end up complicating what I say and then makes the matter more complicated and misunderstood at work. I struggle with speaking with a good flow and putting together the right vocabs. This lacking is now harming me at work severely and I want to improve. Also FYI, I don't have toastmaster nearby and there was before but it's now closed since there aren't many people who joined it. I'm working in Japan and in global division so mainly have to speak in english.