How can I avoid playing vs smurfs as new player?

Hi, I recently introduced LoL to my gf and she wants to start playing it occasionally. The problem is that after the tutorial, we went into a normal game. But these games are full of smurfs who obviously have played this game before. This makes it practically impossible to even have the slightest chance of winning lane. Is there anything you can do to prevent going against smurfs in pvp games? Or do you really have to play bot games until you are good enough to go toe-to-toe against smurfs? Thank you for your input! EDIT: Is there any Rioter who can give some hard info on how low level matchmaking works?
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