Knucklesofchaos

Hey there all, so I am in a bit of a fink.... For about the last... three weeks or so. I have been trying to get audio sorted out for my stream. At first I was using NDI to do all that and the sound is already put into the stream with it. But then got a capture card. But I would need a mixer to be able to control the sounds and such. I used Voicemeeter Banana due to it being free and rather simple. But either I am dumb and or doing something wrong, but I just cant get it to work. First every time I would use it, in discord calls with friends. My desktop audio, i.e. game sounds and such would play into my discord call and stuff. And so looked around on youtube... messed with about four or five videos, nothing seemed to work. THen last night did a break through, fixed it to where discord wasnt picking up my desktop audio. Idk how I did it but it was fixed... but then my stream couldnt hear my discord chat.... So messed with it trying to figure out what to do.. Nothing seemed to work. So ended my stream early today. Started looking online on guides on how to do audio for a dual pc setup. And that has just been annoying and unsuccessful. I have the mixer I would like to get which is a, Behringer Xenyx 1002 Premium 10-Input 2-Bus Mixer with XENYX Mic Preamps and British Eqs. Its not too expensive and gets what I think done for a good price. But now cables to get? Any other equipment do I need. I would like to keep my headset with mic attached with it which is the HyperX Cloud Alpha S, which I use the USB connection for it. Just been running into several issues the last month and a half and I just cant find anything useful or helpful on youtube or google. Anyone know of a good tutorial that shows you how to setup every thing? Im more of a visual learner then verbal so if its a video and or a good PP presentation I can work with it. Thank you all for the help whoever post. Heading to bed.