I agree with @CindyUNC that certain occupations will be in immediate demand. The crucial question is how sustainable the job creation in these sectors will be. For example, there is strong demand for health care workers, paramedics, and people assisting in testing on SARS-CoV-2. Their employment basically depends on how long the pandemic continues.
In addition, think that there is strong demand for workers in tech sectors that are dealing with equipment for home offices, distance learning, and distance conferencing. Probably the demand for these services will not collapse after the pandemic ends, because at least some businesses might stick to the new ways of operating when they are more efficient.
On average, however, the next few months will definitely look grim in terms of labor demand.
Perhaps a way of judging the success of training measures in such an environment would be whether they could help to avoid layoffs: E.g.: offering a firm to train a worker who would otherwise be laid off for 30 days (in which the firm would not have to pay the wage) and afterwards observing whether the person is still employed with the firm after, say, 90 days.