the whole point is to grow it over time , and it takes a week or 2 to even start to take root and grow a little bit. It is harder to do both at once than to just veg , flower and start over again planting seeds.
If you are going to clone it and go back into flowering you might as well leave the branch on the mother plant. If the plant it came from was flowering it takes another couple weeks or month to re vegetate so its easier if it comes from a plant thats vegetating. when making clones get it done quick, dont let the cutting dry up. then you can basically water it (and mist the leaves) and it should survive usually.