Back to veg after flowering has started?

Is this possible?

Small plant, got as a gift a few days ago. Was outdoor for at least a few days.

Only about 8", not very busy, and looks like it's starting to flower. Now under 24hrs light to hopefully get it to grow bigger before putting it to flower.

Will this work or is it just a bad idea and should just be left to flower...?

Try it for a while. You may have to trim off all flowering material at some point, it can be done. Can be a long process too. I found it to be a learning experience. I started really looking at the plant, trimmed the hell out of them several times to get rid of all the old growth without killing the plant by doing it all at once. I think I started the process in late April or early May. Just harvesting the results of that now, so about 5 months total. Strain is ww, yours may work a little different. VV