Professional painting and decorating is hands-down, not easy. For one, it takes a huge difference in choosing a reliable supplier. The cheapest materials are not necessarily a good bargain. These supplies or materials may not be as effective. For example, cheap brushes usually hold less paint, resulting in double the effort.
Another factor you should pay attention to detail is preparation.
Preparation takes a lot of work. Beginners often become frustrated and think that the one-coat paint advertised will bring good enough results. However, preparation also includes scraping away old paint, using fillers and filling in gaps around cracks, killing molds, or even grouting.