Here are some tips!
-Feed on a schedule. That way you will be able to better know when you puppy needs to go potty (well at least #2).
-Always reward her when she goes potty outside. Use treats, playtime, praise.... whatever it is that she goes crazy over!
-Take her for a brisk walk if you know she needs to go potty but isn't. The exercise will help to get get things moving!
-Take her out often! With my most recent addition, I took him out every hour until I had a better feel on when he needed to go.
If your puppy doesn't go potty, then either tether her to you or put her in a crate. Then try again 15-30 minutes later.
-People often find it helpful to record when their puppy or dog goes potty when first trying to housetrain. Manytimes you will start to see a pattern which will help you to know when a dog/puppy needs to go out.
-Always supervise her when she is inside! Tether her to you with a leash, or use babygates to keep her in the same room. If you can't see her then you won't know what she is doing! She could be chewing on something or going potty. If you are always watching you should always be able to catch her and take her out to potty.
-If you are not able to watch her then put her in her crate or other special puppy proofed area.
-To not give her access to the entire house. Close doors and use baby gate/xpens to limit where she can go! Again if you aren't watching her 100% of the time how will you know when she need to go out?
-Clean up any accidents. IMHO an enzyme cleaner like Nauture's Miracle works best. That is that brand I have used in the past but there are plenty of others on the market! Enzyme cleaners are great because they will remove all odors! If you clean up with someting different you may not be able to smell it, but your puppy still could. Any remaining odors could be signaling to your pupy that this is their place to go potty.
Good luck! Welcome to the forum! And thanks for saving this puppy!