Low HDL isn't "hurting" you at this point because LDL concentration is too low to accumulate plaque.
If you go lower, HDL becomes a factor again because it's the vehicle that reverse transports cholesterol from the arteries back to the liver for elimination.
Without it, the reversal of plaque isn't possible.
What's even more important than quantity of HDL is "quality" of that HDL. Without enough Apo-I, the HDL you make is like a truck that can't hold any cargo (cholesterol):
Cardio is the #1 way to boost Apo-I,.10-15%.
Normally I'd suggest ezetimebe as the gentlest, no side effect way to drop LDL further, but if you're interested in taking advantage of your low LDL to get plaque reversal, pitavastatin is the only statin that boosts HDL levels and function in any meaningful way. Apo-I increases 3-5% at 1mg, 5-10% at 2mg, and 10-15% at 4mg (which will also drop your LDL another 45%).
It's the most expensive statin, but worth it for the non existent side effects and HDL benefits. It's approved worldwide, but if you can get it from India 100x4mg is about $50.