Buying Lulu?

I have yet to play ranked and am level 30 already, so looking for a champ to buy. Lulu seems one that can help push out games to win them since she has high damage early on and in late game can support team mates. But the thing is, I have a pretty low ELO and I am not sure if she is a champion that can carry games by herself if you don't got team mates you can support. So is lulu low ELO viable?
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