Your LDH cholesterol level was 530? Yes, that is very high. Are they starting you on a statin medication to lower it? That would be wise. Talk to your doctor. Here is a helpful guide for lowering your LDL cholesterol through lifestyle to compliment medication you may be prescribed. https://www.nhlbi.nih.gov/files/docs/public/heart/chol_tlc.pdf. Make sure to exercise if you are allowed on a regular basis as that raises HDL which brings down your bad cholesterol numbers.
Let us know what the doctor suggests for you. Hang in there.
The lactate dehydrogenase (LDH) of 530 is high, I would discuss this with your physician.