Hiding your stutter as a stutterer is probably one of the worst things you can do. I've been stuttering for 10 years, but it has improved significantly 5 years ago thanks to self-hard work and acceptance. Long story short: don't hide it. Be confident even if you feel like you aren't. Effective treatments work differently for every person that stutters, so no one can really answer that question. I recommend looking for techniques that work best for you. It may take some time, but it can improve.