Can someone give me advice ?

If growing solely under those lights, it could be difficult to obtain the yields you expect but none the less keep your plant squat, aim for an even canopy by utilizing low stress training and remove some foliage to increase light penetration. Could be growing outdoors or keeping plant in an area of the house that gets natural sunlight and use what you have as supplemental. A fast paced growth is accomplished by meeting nutritional and environmental needs and requires some knowledge. Do what you can for now and slowly acquire appropriate gear to elevate your plants surroundings and keep learning and asking questions. Cheers 🍻

Get more light is biggest improvement can make. You can Top or LST to increase the yeild.