Go to https://www.astro.com/cgi/genchart.cgi and generate your natal chart. Make sure to use your accurate time of birth, as this is especially important here. For "drawing style" choose "WWW", and if you scroll down slightly you can see "house system", for which you should choose "placidus". You can leave all the other options untouched. Make sure also to not give them your real name. Use something random.
With an accurate time of birth, you will be able to accurately inspect your houses in the chart that you have generated. The houses are the things divided up by black lines across your chart image. In each of these houses you can see a number that tells you which house it is. You will also need your accurate place of birth in order to inspect your houses and Ascendant properly.
If you do not know your time of birth, ask at the hospital you were born at as they usually save this for a while. The exact time is important, down to the minute.