Yeah I think you will do fine with some outdoor light. Just start putting it out in the day when its warmer and bring it indoors while its still abit cold, cus its auto you should be fine. Now its showing signs of flowering by putting those pistols out try your best to get as much light as you can on them as your at a crucial stage. Really with autos you want to give them max light and max root space straight away. I sometimes used to grow in small pots due to space, but I used to have small hempy type pots. Id have a sort of double pot, one in the other. The one sitting inside would have lots of holes in the bottom and the outside one none. Id have the iner pot sitting so I could have a third of the outer pot with water, so the roots would grow out of a coco soil mix in the iner pot and out through the bottom, ther would be a small air gap and then into the water in the outer pot. Its kind of hydro but simple and you can keep the pots small but grow big plants. Keep us updated with how you get on please. Will be cool to see.