You aren’t bothering people until you are bothering them. The act of sending an email to someone isn’t bothering them until they say what you are doing is wrong. Don’t flood people with email, but make sure you follow-up. People are more forgetful then you think they are.
You feel better when you say what is on your mind. You will feel better. People will know you are authentic. This doesn’t mean be rude or terse, but just be upfront. People cannot read your thoughts, and they will appreciate what you say. They know you are honest.
Active is better than passive. Just say what you said instead of adding words to cushion the blow. Write what you mean because the fringe sucks. Leave as little as possible to the imagination.
Just go for it.