Welcome I am new to this myself. We have 3 Beardies lol. I beleive bathing them 1-2 times a week helps them with shedding as to how often I dont know. I am sure if the info I have give is wrong someone will have the right info. I hope this helps
At 14 months old he may be close to being fully grown, so he might not shed all that often - they shed more when they're growing.
Beardies don't really need baths unless they get dirty or are having trouble shedding (by that I mean the shed is coming off scale-by-scale, or they have retained shed). They come from a very arid environment and have evolved to be able to function (including shedding) without needing much in the way of water: