Yaarel
🇮🇱 🇺🇦 He-Mage
It is a game. At the same time, ethically, people should not be endangering their own lives unless they are an adult. America has soldiers from the age of 18 to risk dying in war, being one kind of adulthood. But 21 is the age of responsibility to drink alcohol, being an other kind of adulthood. So roughly 20 years old is a reasonable age for adulthood in every sense.I've had characters start older than 30. There's nothing that requires PCs to be teenagers. Rabbis start in mid 20's, and priests of Ilmater start at the age of 6. Made that up, but this is fantasy, so nothing says you have to be 30ish to be a priest.
There are exceptions, but generally speaking, it is reasonable to expect most level 1 characters, who decide to risk death as adventuring combatants, to be roughly around 20 years of age.
In my head canon, I keep in mind the following age brackets, unless I have an exceptional individual in mind. Most people in the game world dont reach high levels, but the ones that do tend to do so by the following ages.
Age: Tier
16−19: Background (level 0) (foster, novice)
20−24: Student Tier (levels 1−4) (apprentice, page, jack, college student)
25−31: Professional Tier (levels 5−8) (journeyer, squire)
32−39: Master (levels 9−12) (guildmaster, knight, sire/dame)
40−49: Grandmaster (levels 13−16) (noble, lord/lady)
50−62: Legend (levels 17−20)
63−78: Epic (levels 21−24)
79−99: Mythic (levels 25−28)
100+: Immortal
The ages are a rule of thumb to give a sense of the world.