I will give you 4 words, honestly, only 4 words, which will make you sound more natural instantly. They are words all my students know, but never use!!
Sometimes trying to replace simple vocabulary has the opposite effect of sounding natural :) Stick to the basics!
Please comment if you like what you hear, or leave me a comment to focus on something in particular.
I have a transcript available here: https://docs.google.com/document/d/1C6uqVQLjxQI0MqNP7zNi57jkcjwtfI_DBJ-hS57KBwY/edit?usp=sharing