Hi Orlonzo,
Sure, you're welcome! The blog app uses WordPress - that does not allow visitors to make posts, just comments. But you can use the articles app to allow members to write "blog posts", or "articles" - whatever you want to call it. it has a feature to show related articles too.
User Manual: https://www.ultimatewb.com/articles-app/articles-app-setup-posting-editing-managing-posts
You already have it set up from the templates generator, at: [your-website]/articles
Regarding "PS: Can a page be created on the left or right side of the website that i can but movies app for members to watch." - not sure what you mean, please clarify. If you mean a side right/left column, yes - just choose content type "Side Right" or "Side Left" on List Pages > Add Page. You can also use the Add Page Content Box to add a section there. There is a videos app you can use, which you have installed here: [your-website]/videos .