She needs to never be wrong.
But DOES get the click/reward when she's 'right'.
Also, I learned to teach entries by pulling off all but the first 3 poles. Getting the clicker out and really yummy treats. Then starting a few steps back with a straight on entry.
When she would get that, then I would start an 'around the clock' handler method to start making the entry at a bit of an angle. So still from a few steps back (you want the dog to THINK and figure out what's earning the click/treat, if you shape it too much so they are 'forced' to do it right, there is no THINKING. And I want my dogs to be THINKING). So maybe just a 1/2 step to the right and then tell her to weave. When she gets that, then another 1/2 step or so. ONLY progress so they are getting it RIGHT (the 'setting them up to succeed thing').
And once you do a bit from one side then make sure you ALWAYS then start around the clock the other direction. If you notice they seem to have more trouble with one side then the other, then you need to make sure you use MORE treats, more rewards and practice that side much more than the other to start with their learning.
I use the 3 poles cause I want the instant feed back of the 'YES' the click gives and the ability to feed without also accidentally teaching my dog that I am constantly going to be pullling them out of a real set when they are weaving right. Instead I really can teach just the entry, and how to weave a set of 3 poles. Just as I also sometimes use 6 and 12 poles. For ALL the entry is the same and you weave to the end.