In ancient times practising astrology required a solid grasp of mathematics and astronomy. Nowadays most of astrologers use some sort of computer programmes. Tons of them could be found online. I personally prefer an online-programme
https://vedic-horo.com/. Their free version builds your natal chart with all the necessary parameters.
To build a chart on vedic-horo.com you will need:
- put into respective fields your name, date, place and exact time of birth;
- do NOT mark the tick-box "I'm not an astrologer" (otherwise the system will provide restricted info);
- click "Calculate".
Voila! Your chart is ready for analysis. You can start reflecting on it using information about ascendent, zodiac signs, planets and houses.