One mistake to avoid is not properly sanitising your equipment before starting the brewing process. This can lead to contamination in your beer.
Another mistake is not following the recipe closely or making substitutions without understanding how they will affect the final product.
Additionally, failing to control the fermentation temperature can result in a less than ideal final product. It's crucial to monitor the temperature throughout the fermentation process to ensure that the yeast is working properly.
Finally, do not rush the process - patience is key when brewing beer at home.