You can either treat the room with sound panelling, put the mic a lot closer so you can lower the gain, but ideally you’d get a dynamic microphone. Dynamic microphones are less likely to pick up reflections and other noise, but you still have to have it up close. It is also less work than treating a room such as you were in in the video I saw.
Lately I’ve been deep diving into microphones and after hours of investigations this is what I’ve learned.
Suggestions: the Fduce sl40 if you want a budget option or the deity vo-7u for a bit higher end or a shure sm7b for yet higher end. A fifine k688 is also a good option.