The Blank Center at UT Austin offers free stuttering therapy but it is a long waitlist. Look into Avoidance Reduction Therapy for Stuttering (ARTS). Every Waking Moment by Christopher Anderson is a good autobiography but also has some practical tips of managing stuttering. Also, the Open Stutter channel on YouTube by Vivian Sisskin is really helpful. It just interviews people who stutter but it can be cool to see what has helped other people who stutter.