More of say this, not that
Here are phrases to lose and phrases to use, if you want to sound more confident.
Instead of saying, “I don't want to sound pushy,” you can say “I believe this is important.”
Instead of “I don't want to take up too much of your time,” say, "I appreciate your attention to this.”
Instead of saying, “I might be wrong about this,” try saying, “Here's what I understand.”
Rather than “I'll try to figure it out,” you can hit them with "I will find a solution."
Instead of “I guess this is okay,” be clear that “this doesn’t meet our standard.”
Rather than, “It’s just a thought,” or “Can I make a suggestion,” instead say, “I have a suggestion.”
Don’t say “It’s probably not a big deal.” Instead, say “This is something worth addressing.”
Rather than, “This might sound silly,” just say, “I’m expressing myself.”
Instead of “I might be overthinking” you could say “I am analyzing this.”
Words leave an impression, and presenting as confident doesn’t mean you need to come off as self-important, opinionated, egotistic, superior, pompous, high-handed, boastful, patronizing, or condescending.