Start your first slave, don't get new slaves for 10 days. Speaking to your slave you can train (click training 4 times, anymore will result in a wasted time) chat, until you can kiss. If your down for bestiality, buying the kennels early also is a good way to get mana. I'd say, build your slaves obedience, and stats for the first 10 days, don't take them to battle unless you personally have taught them a skill to use in combat.