We have established that the system for learning blood sorcery is the following, for now:

Sorcerers can now roll Intelligence + Occult at a difficulty of (Sorcery Rank to be learned +3 once per day through their learning sessions).

In-clan sorcery requires a total number of successes equal to (Sorcery Rank to be learned + 5).

Out-of-clan sorcery requires a total number of successes equal to (Sorcery Rank to be learned + 7).

This applies to rituals as well.