First time! Pineapple glue grow! Advice please!

Hello guys! New grower here looking for advice and help. She is a pineapple glue feminized from advanced seeds. She is just over 3 weeks now and i have been giving her 18/6 light. 12 hours of sunshine(5 hours of direct sunlight) and additional 6 hours of artificial light as where i am the daylight is pretty much around 12 hours all year. I am using a household 40 watt cool daylight bulb and a cheap led grow panel 14 watts. I fed her first time 2 days back with a locally sourced 3 part hydroponic nutrient and she seems to take it good.
what do you guys feel about this and what can i do better?
I live in a coastal city in south india where the weather is hot and humid with average temperatures around 35/27 degree Celsius and humidity around 60-90%
As this is my first grow,should i top her and try lst or just let her grow as she wants without any training? Also the sunlight hours is around 12hours 30mins now and reducing by 30 seconds each day. It becomes exactly 12/12 around october first week. Will she start flowering if i just leave her outdoors as its not exactly 12/12 till october. Am planning to start flowering in 2 weeks or should i wait for more time?
Thanks

Man, I’d give it as much time as possible to veg, atleast 4 weeks min. You can choose to flower afterwards and leave it outside the exact 12/12 can be 11/13 or even 10/14

Okay i can do 4 weeks veg but is the additional lighting i have sufficient enough?. I can add another 40w household led if its needed but broke now to invest on a good led grow light.