I can't log into my home wifi on my Acer Chromebook laptop

I have a refurbished Acer Chromebook laptop that works well overall. It's doesn't tend to be slow and has given me very few technical issues so far. I just got my home Xfinity wifi network. Whenever I've tried logging into it via my laptop, I can enter the password and have it look like it's connected, but then can't visit the login screen. I can't get online after I just enter the password and it gets accepted. A box pops up telling me to visit a login page. Whenever I click that, I just get an error message. This has happened over and over again on three different days now. I can log onto xfinitywifi, but not my home network. What can I do? I can't seem to be able to do anything about diagnosing the problem either when I try to click the link to do that. How secure is xfinitywifi if I just need to rely on that? Thank you.