Final answer:
The provided references do not explicitly state Tim's interested careers in 'My Brother Sam is Dead.' However, they suggest that young men of that era, like Tim, might be inclined towards military service, literature, or skilled trades.
Step-by-step explanation:
In the historical novel My Brother Sam is Dead, the character Tim expresses interest in multiple areas despite not attending school during the war. The specific career or careers Tim may seem to be interested in are not clearly stated within the original question nor is it directly inferred from the provided reference texts. However, considering a broader context of the era and taking cues from the references that discuss individuals finding their passions or callings, it can be inferred that young men like Tim might have been interested in occupations that were available or esteemed in that period such as military service, literature, or other skilled trades based on their upbringing and societal influences.