Don't bother too much with calculations. At least, I didn't except for delta already learnt with BSM. Keep it with delta and gamma and delta & gamma hedge. Also, you need to know explain the meaning of each symbol and how is related to put and call AO and EO. Learn also specifics of greeks for some exotic options because the meaning and use of greeks might be completely different on some.
Hi @Serdar7891 I just completed a playlist on youtube that includes a sequence on the greeks. (I'm honestly really proud of it). It's here, it's twenty videos, from FRM T4-1 to FRM T4-20 but the greeks start at Option Delta (FRM T4-13) https://trtl.bz/2Jo4oZy