I’m in agreement with @emergingsoul up to a point. While it may not be rocket science there are methods of approach that can save you a lot of time and money. When changing to the space I use now I brought in an acoustic engineer to measure and advise on the best placement solutions. At the end of the day everything was placed and sizing/layout for panels was complete (I use absorption as opposed to diffusion). It took a couple of weeks to have the panels fabricated but once installed everything came together.
I’m definitely a believer in the importance of their use but it seems there are a lot of instances where the balance between a live space and dead space swing too far from what is necessary.