I'm not here to teach you how to say no, I would assume the word itself is not that complicated, and that you're fully capable in pronouncing both letters, one after the other. I'be been reading most probably way too many posts on how to say no, I was actually surprised people are actually giving true lessons on how to say the famous no.
I won't teach you, you know how to say it, you can say it, and as a matter of fact you can be really annoying saying it over and over again. Remember when you were only 3 years old and you discovered the magic of the no, you kept saying it without someone teaching you how to do it.
What happened meanwhile? Well I think it's more relevant to understand what's holding you back, as in the end it's not about just saying no, but it's about expressing your point of you, or taking attitude, or simply allowing yourself not to care. Somehow you ended up meeting expectations instead of setting them. Does this make you a