Currently, the only way to experience the work is via the original Japanese cast. You can find the series on various enthusiast-run streaming platforms and community forums that specialize in niche Japanese animation. These versions typically feature high-quality fan-made or official English subtitles (softsubs or hardsubs) to help international viewers follow the story. Will an English dub happen in the future?
If you see someone asking for it, be kind. Point them to Watashi no Shinshoku ga Tomari ni Kuru if you can find it. Or just tell them: Sometimes, the best English dub is the one you imagine. shinseki no ko to o tomari da kara english dub work