Too much projector?

Hi yall,

My cousin worked IT for some random company in Phoenix and he got this after they upgraded their auditoriums system at least 10 years ago. He never used it for years and gave it to me since I like to watch boxing fights and host gatherings.

I bought a replacement bulb and boom. It worked. I watched the a few boxing fights and everything was great. My biggest issue was getting audio out it. I have been using a laptop via HDMI. The only way to get audio was using a aux from my laptop to a general speaker. I bought a HDMI splitter, but it had a horrible hum that was hard to ignore.

Do I need a special set for this thing? Is this "too much" projector for regular ol home use? How would you get the audio?