Vitamin d3 oral solution !

Hi everyone, I’m unsure about my vitamin D levels and would like some advice. I’m not interested in taking a blood test. As someone who goes to the gym, can I take a vitamin D3 oral solution once or twice a month? I have a 60000 IU bottle in hand.

Also, I want to ask, if I have a deficiency, will taking it 1-2 times a month improve my deficiency?

Thanks you !