I prefer to use the whole sign system just because it’s easier for my brain to comprehend, but when you generate your chart online, you can usually switch between house systems and choose which house system works for you.
The signs also sit within a house in your birth chart. There are 12 houses which all host a sign within them, but the houses are interesting… because depending on which house system you choose to view your chart in, houses can either host two signs within them (the Placidus house system) or just one (the whole sign system). I prefer to use the whole sign system just because it’s easier for my brain to comprehend, but when you generate your chart online, you can usually switch between house systems and choose which house system works for you.