I was gifted an aucustic ibanez 12 string guitar, help me treat it right

[colin2121]

Given it has been sitting for a while it might be worth getting a guitar tech to do a full setup.
The nut may need a bit of work apart from truss rod adjustments.
Lemon oil is probably the best to use on the fret board. It helps to clean gunk off as well as nourish the fretboard which is probably rosewood.
12 string guitars do not have pairs strung to the same pitch. Only top E and B are tuned the same, the other four are tuned one octave apart so regular strings are not usable

[Manisk]

Given it has been sitting for a while it might be worth getting a guitar tech to do a full setup.
The nut may need a bit of work apart from truss rod adjustments.
Lemon oil is probably the best to use on the fret board. It helps to clean gunk off as well as nourish the fretboard which is probably rosewood.
12 string guitars do not have pairs strung to the same pitch. Only top E and B are tuned the same, the other four are tuned one octave apart so regular strings are not usable

thanks for your time, although it might require a guitar tech to reclaim the guitar fully i do feel confident that i am able to get close by myself since i've had 2 electric builds so far
i couldnt get ahold of lemon oil so i used the linseed, the fretboard was extremely dry and is still soaking up the oil
i also spent some time to freshen up the frets, removing small nicks and polishing with a leather strop







can i oil inside the guitar aswell? and what if any information can get from the serial number?