Skunk#1
Ive ad OG UK Cheese (Skunk#1) rooted under 5 days. Widow 5-7 days Then Kush Skunk 6-10 days.
Also sativa dom vars like haze will root and grow fast flower long.
Whats best in this situation is grab a pack of regular select the best from all the fems.
I use clonex and its good shit. So long as you don't keep dipping into stock (separate enough for few cuts per time).

Widow is mentioned alot because she's a reliable stone-easy to grow and allways performs
Hazes arent practical to learn with as they take loner than 10 weeks (13-15 is a good ) need alot of time and patients

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Begin with a seed and hope for weed