Should i play Ranked?

Idk why, but i was thinking of playing with my Gf a bit ranked games Im just worryed i would land in bronze 5... The problem is : I once played solo, and i saw that my skill level is over the one from my teammates, not that they where bad, but they did obvious mistakes i did not do like, facecheking a bush when all enemys are missing, doing solo drake/baron when all enemys where missing, loosing much cs, and stuff like that i am really worryed that i would land in B5, but it is also dumb to only root at the uranked lv.30 icon on my profile what do you guyy think ?
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