Suggest Remedy For Pimple Scar

I just popped a pimple the other day, it may have been a small cyst because the pus was not visible on the surface, but it was red, warm to the touch, and I felt pressure in the area. Now that the scab has fallen off, it is pink with a deep hole. I m worried that the hole will lead to a deep acne scar. I ve heard lemon juice or tea tree oil applied to the area will help it heal better with less of a noticeable scar. Is this true? What are other effective at-home remedies to this? Thanks