1. Semi sentience is a bit of a grey area. technically you need Yang Release to actually have a sentient weapon, but it really depends on what you mean by sentience.I have a few questions:
1. Can semi-sentient weapons be created under Custom Tools? According to what I read only 1 CW is allowed per bio? (No idea around this) alongside some other custom tools.
2. From a Academy Student standpoint, what landmarks would be relatively safe to start my journey on? Or does that not really matter? However, I can't quite spawn on land claimed by some WSE clans, I think?
3. Is is worth adopting Sharingan into my (only) bio early on since I am planning for a Rinngan (+ more) game for the long haul? Or will the KG be a hinderance to try other stronger combinations early on?
2. It doesnt matter, you can start in any landmark that isnt claimed by a clan. So this means any marketplace or any non claimed landmark.
3. You can get what ever you want, it really depends on what you want to do or go for. If you want Rinnegan, you have 3/4 options, which are:
Nagato - https://animebase.me/threads/uzumaki-nagato.324732/
Obito - https://animebase.me/threads/obito-uchiha.284521/
Madara - https://animebase.me/threads/madara-uchiha.284507/
Sasuke (6 paths) - https://animebase.me/threads/sasuke-uchiha.724263/
Hagoromo -
You must be registered for see links
(in order of difficulty to get).
If youre going for rinnegan the only way having sharingan will help if youre going for the obito/madara/sasuke route.
Nagato and Hagoromo dont require sharingan prior.
Edit: although I will say those pages are a bit outdated because now to get any of them first you need to pass a skills test.
the actual requirement for the characters can be found here: https://animebase.me/threads/roleplay-tier-list.756468/
eg so to get madara you'd need to pass a skills test, and an EMS madara test or mission then pass an advanced madara battle test
Where as Nagato, youd only require to pass the skills test