Don't even worry about +1 items until your level 30 +1bow. (and the level 21 +1beetle rings). It will make a difference, but isnt necessarily worth the 20k extra over a regular 10k Power Bow that you'll be replacing with another 45k Great Bow+1 at level 30.
Accuracy Up helps, but getting your +rng acc +agi items helps more. Every ranger starts slow, and misses a TON, so dont fret. I solo'd to level 18 with ease, then when things got rough I partnered WHM to level 24. If you already have Utsusemi you can solo to 24 yourself (on worms in Highlands, Koro, and Qufim, of course).
At level 36, I have +12agi and +42rng acc. I miss probably 10-15% of the time, at most. Keep in mind, each +2 AGI= +1rng acc and +1 evasion... so I would boost +rng acc, +rng atk, +AGI, +STR, in that order.
You'll far surpass all others for damage all the way on up to 30+, with the exception of BLM, who you will be toe to toe with. So I wouldnt worry about having the best gear and items early on. However, when you do get 30+, its best to work by the policy "No money... no exp." When you get low, go farm. Don't be cheap about it... you pay to be the best as a ranger... :)
Akihiro 44 RNG/NIN
Aesir Linkshell, Seraph
Jobs: Ranger (44), Ninja (25), Samurai (1), Thief (30), Warrior (20)