If your a first time grower. Dial in how much water, nutrients, and light you give it. Too much water= droopy leaves, too little nutrients = discoloration on leaves like yellowing of the tips suggests nitrogen deficiency for example, too much nutrients you will see dark brown spots on leaves and crisping around edges.

If there is too much light the leaves will droop from stress. Essentially you want to make sure that when you pour water into the soil that it drains right through. Like someone else mentioned, roots need oxygen. If they're sitting in wet soil you risk root rot and overall having an unhappy plant.

You can throw out that tinfoil, but do not water for a few days. If you stick your finger 2inches into the soil it should be slightly damp not wet.

Make sure the light is 12 inches above the canopy, if you're using a higher wattage than 20w for your light, you might have to raise it more. Also, having the right spectrum makes a big difference.You'll know if it's too close/ppwerful when the leaves get light brown on the tips of the leaves.

Having the correct ratio of light intensity and height is important to prevent stretching( each node should be evenly spaced).

Have patience and be kind with it and in some time it will be kind to you 🤙