Conclusion
Above all else, have fun.
Make what you like; there are likely others who like what you like.
Always be considerate.
Always be "professional". When writing anywhere, remember that your words will be on the Internet "forever". Don't give yourself a bad reputation by typing something stupid. Never post anything personal. Keep your writing on modding topics.
Never reply to trolls, immature people, or even those who are too lazy to write coherently. Ignore them.
Be aware you will likely get requests once you release something, but you don't have to accept any. Don't be pressured.