I have a few general recommendations.
First, find out if the employers require the 40 hour training course or the 24 hour training course. The differences are in the amount of exposure you are anticipated to have, and the difference between being a General Site Worker or an Occasional Site Worker.
Second, be careful about spending your money on the online certification courses. The OSHA requirements for a 40-hour course are classroom instruction
plus three days of supervised field experience. In other words, you may not be "ready to work" just because you have an online course certificate. [
OSHA opinion letter]
Third, and finally, there are always "quick buck" companies that pop up to take advantage of situations like this. Know who you are working for, and know how well you are covered for liability and for injury.
Unfortunately, I don't have any advice about any actual opportunities that may exist.