Pregnant guppy pls help?

i agree with the above poster. set up the other tank with some gravel and water from that tank to speed up the cycling process. then put her in asap. most likely she'll want to be alone, i know when i had pregnant females they would chase other fish away. and i'd try to find something for the babies to hide in. really anything could work, do you have a fake plant anywhere in the house? you could take the leaves off and put in the tank, you could even use a hairbrush and they could hide between the bristles.or if you have some rocks you could make them a little cave out of those. just look around your house and see what you can find, even if it's not something you would normally put in a fish tank. just make sure you wash it really well. so get her in there, maybe add a little sea salt to help with the stress, then just leave her alone and don't bother her much.