The best advice I can give on this subject or any is this ... If you want to rescue a creature, make sure you're well prepared! Armor yourself by being informed and ready for the unexpected. If you take it into your care a creature you're unfamiliar with, and can't properly provide to the needs of the creature in general, then you haven't rescued that creature. The creature has just been exchanged into the hands of someone who again does not know how to care for this creature. And is ultimately back at square one to receive proper care. We all want to do what we can for this hobby and life style of loving reptiles. But sometimes saying "no" will be in the best interest of the creature.
I've been on this site for 3 years or so, and have seen many "I rescued" threads. You open the link and the first thing you see is "So, how do I care for it?" Just my 2 cents on this matter. Happy herping!