Advice on beginner’s dulcimer
Instruments- discuss specific features, luthiers, instrument problems & questions
That tuner should work just fine. Check the calibration, it should be set to 440.
Maybe one of the folks here will recognize the name and the instrument. In any case it will be fine to learn on. The one thing I can think of that may cause a problem later is it may not be made for equal temperament tuning. As long as you play alone that should not be a problem.