Youtube channel creation and optimization

I am looking to create and optimize a Youtube channel for educational videos. I need help with creating visuals so the videos are engaging and the content is interesting. I plan to upload videos on a weekly basis. I am looking for someone who can create the image that appears first in the video. Additionally, this person must have an understanding of SEO and how to maximize organic traffic for a Youtube channel. My idea is to have a school where people can see videos related to finance and wealth asset management. I currently have 5 courses each of them with a. 10 hours duration. All videos of each course must be inside a reproduction list (for the student to be able to see those in order). Also, I need a description in each video (I have docs, codes and many other extra resources that I want to display). Also links to my Social Media.