It would probably be hard to get anything great at this type venue, but to do events it takes learning how to work with whatever exists. I wouldn't expect to get a lot of great shots here but at least get something I need of what's significant.
I've done sports and events and it took - A LOT OF PRACTICE. Even with events I've found it's the timing as much as anything. And it's usually working in low or uneven weirdo lighting (indoors anyway).
I've done a variety of events, took pictures for a local team for marketing a few years ago. I usually go early and check out the place, wander around and start figuring out some possible vantage points. Even though apparently our eyes may see light differently than a camera will record it, I still look around and see where the lighting looks the best in the room and try not to be in or facing into dark corners/areas.
Besides the funky color, these shots look like you need to improve framing and vantage point. I'm not sure what I'm supposed to be looking at; to me they seem either in too close with not much in focus or there's too much going on.
Lines in the background such as panelled walls need to be straight. So does signage if they might want sponsors' names or a picture of a sign about the event, make sure they're straight and not cut off mid-letter.
In the one horizontal shot there's a round table to the left that could have been a possibility (maybe, there's a big bag sitting there) to maybe get the table decorations. The long table to the right could have made for a photo. The people at the back, well, we don't want to just see their backs, get it from the side - that's where you go early and see where things are set up to figure out where you could get some photos. I find it can take a good bit of watching and waiting, watch as people move in and out of the viewfinder til you get a good potential photo, watch til they turn to go, or speak to the person next to them etc. so you at least get profiles.
I'd go find some event(s) where attendees are permitted to bring cameras to go get some practice. I wouldn't plan to use the photos other than as practice, just go enjoy the event and roam around and do some people watching thru your viewfinder. Think about what at the event you'd photograph if you were working the event, where would be a good place to get some shots, etc.
I think if you develop skills at shooting events you'll develop confidence as you go because you'll probably start feeling like you know what you're doing. I could go shoot an event because I've done it a zillion times, it's second nature and almost automatic to know what to do.
Once you do the upcoming event you'd probably benefit from continuing to develop skills, figuring out what works for you, and getting in a lot of practice before taking on any more paid event work so you're able to be successful with it.
Framing. Timing. Vantage point. Practice, practice, practice.