These are tricky even for the "experts". I used to grow them from seed and had some luck with bringing them out of their dormancy and reblooming them, but it was kind of hit and miss from year to year.
If the foliage is all yellow now, keep the plant in the pot and store it dry and cool until about mid July. Around that time, you should see new growth starting. These rot very easily, so make sure when you do start watering again to avoid watering the corm. Water around it.