Over the years, I have published probably hundreds of written and video resources on the biblical feasts, which are all available to you free of charge. There are too many to list here, so I will provide links to where you can find them.
Written resources: https://www.hoshanarabbah.org/teaching.html#feast
Video resources: https://www.youtube.com/playlist?list=PL5EzE5DQnrHfWWbczzkRo6IOnglxhbRfM
Articles on this blog: https://hoshanarabbah.org/blog/?s=biblical+feasts&submit=Search and https://hoshanarabbah.org/blog/tag/biblical-feasts/.
Happy studying!