I had never even touched the screen at Starbucks until days after I got promoted to SBTL. I'd even have the barista requisition drinks when we needed to do it (I just logged in). It made it really hard for me at first, but better in the long run. If I already had experience, then I would've learned all of the terrible habits that the team had. By starting fresh and training at a different store, I was able to learn how to do things the right way. My team trained me for Food Ave and we ended up failing our first Pizza Hut visit (it was announced and everything so we were fully prepared and still failed, because of the bad habits that the team taught me).
As for advice, I'd recommend skimming through some of this thread. If she has never learned Starbucks, the biggest piece of advice I tell new TMs is that 90% of the drinks are based off of a few different recipes (flavored latte, tea, frappuccino). Almost all of the drinks are just different flavors, so learn those and you'll know most of the drinks. Then there are a few others you'll have to learn, but you can flip through the recipe cards for those for a few weeks. Latte instructions should be stickered on the espresso machine; tea instructions are on the tea shaker that you make the drink in; frappuccino instructions are stickered somewhere on the Cold Beverage Station (area where you make the fraps). People try to overcomplicate things by thinking of each drink as completely different, but they're almost all the same, just with a different syrup.