Same age, same position just a different mindset, what I did was practice, practice and practice. I was so much angry on my situation but I don't wanna waste my life regretting so I choosed working for it. Till now my stammering is not 100% removed but I would say the confidence part is what I have conquered where I don't feel nervous and I try to slow down whenever I stutter and acknowledge the situation also to make it more comfortable I tell the employer to don't mind if I stammer. He/she shows a little empathy with me.