Q: Should I always follow writing advice and writing rules?
A: Absolutely not. Make your own rules. Break them. Create new ones.
As corny as it sounds, following your heart is the best path to go down as a writer. There's so much static out there about rules and queries and things you should do and not do, but it all comes down to what you think is best. How you define success. What you want to write. What is your art.
Create new ones.
Fall a a few times and get back up.
Find what works.
Find your voice.
And keep writing.