Trouble Loading Past Homepage

I just transfer from Blogger to WP, but have run into a few issues, the main issue being that past my homepage, my site does not load.

I set my permalinks to default but that was not the case. I do not have a static page set and I do not want a static page. What is causing my website not to load past the homepage? What can I do to fix this?

Secondary issue: After the transfer, my posts did not load any images. I tried installing an automatic featured image plugin but that did nothing. Is that an error on the plugins end, or mine? I’d rather not have to assign each post a featured image manually if I don’t have to. I literally have hundreds of posts.

Thank you for reading this through. I appreciate your help!