Hi , as per your question you are severe deficient in
vitamin d. This is not of much worry but in long term deficiency, it may affect your immunity and health. So start recovering the levels. You can go for any cholecalciferol 60k IU tab or powder. It is to be taken once a week and for 8 doses.
Next Steps
after that check your status for how much recovery is obtained.
Health Tips
sun is the best source for
vitamin D. you can have a schedule of morning walk in sun to maintain the achieved fulfillment.