Good luck. Plenty of us here that either setup or run House of Worship livestreaming using OBS Studio
Sounds like to you need to learn a bit about Sources (and their role in OBS Studio Scenes) ?? maybe? can't be sure from your post.
As an aside - I'm an IT expert (decades of experience) and I found OBS Studio a bit intimidating to start. OBS Studio is powerful free, open-source software, which means the costly UI effort to make things easy for end-users is often not there (and can interfere with knowledgeable users direct access to more advanced features... basic software issue, not unique to OBS Studio). And I've known plenty of smart women in my IT career, so that you are a pastor's wife doesn't mean you are any more or less capable in terms of technology ;^)
So... what I'm not sure is what has already been setup, whether this was working, before or a completely new setup, etc. And my basic recommendation is to always start at Operating System level when dealing with Sources (audio, video, etc). So is camera video visible in web conference app or similar? then make sure Operating System permissions set properly.
in my experience getting OBS Studio to work nicely is WAY beyond kindergarten level complexity. but, getting something really simple and easy to usually work... maybe. Personally, I'm not one to watch YouTube videos for learning technical details. I'd much rather read something. Here are some researched and edited materials that might be of use to get started. I wish these had been available when I started
https://streamgeeks.us/ Online Resources
and sometimes a necessary tool -
https://streamgeeks.us/fix-audio-sync-issue-in-obs/
One important thing to remember is that the OBS books were valid when published. There are newer versions of OBS Studio since the books published, so some things might have changed. But the more recent OBS book should be close enough.
Also, beware - real-time video encoding (which is what livestreaming entails) is VERY computationally demanding. So older, low-end CPU, laptops, etc can sometimes be inadequate for the job (depends on technical details). I say this so you do NOT assume an older, low-end computer can easily handle livestreaming. With a truly optimized setup, lots is possible on under-powered, but takes significant Operating System (OS) and OBS Studio expertise to pull off. I say this to avoid unrealistic expectations. A decent 5yr old PC should be fine, with decent RAM, GPU, and OS config
