I'm just at the beginning but kinda forgot/didn't get the story

As I said, I'm just at the beginning. I'm when we get teleported to the other world and find out our maki isn't really our maki.

I'm sure a lot will be explained but could you help me getting the story until now?

We went to the hospital to see Maki and the city was flooded by demons and we find out it's because of SEBEC so since we have personas we try and stop them because yes, we are the good guys?

If I forgot something please tell me but especially DON'T SPOIL IN ANY WAY PLS especially don't tell me something I'm not supposed to know now and will be able to figure out later.

Thanks.