Some of the best lessons in life are made by mistakes and thereby learning from them. The problem with mistakes is that sometimes they can be costly so it’s prudent to avoid mistakes in the first place by adhering to the warnings.
Where do you begin in learning from mistakes? Going for long periods of time between writing can be one; for some going outside your field of experience can be another and improper English or grammar is another.
Do you believe in “writer’s block”? It’s a popular malady that a lot of legendary pros have experienced but for most newbies it would be lack of ideas or thinking of a good beginning. Anyway, we’re all going to make mistakes so don’t be afraid to get started.