Arrows have plastic or feather fletching. If I were ordering arrows, I’d order from Jerry at Southshore Archery. 18”, preferably 20” Spynal Tapps, spine matched, 92g double Tapp insert, SK300s in Offset, flat plastic nock. If you want lighted nocks, get a Lumenocks and then use 125g points. If unlighted nocks, either 100g or 125g points. If you use fixed broadheads consider standard Slick Tricks or Griz Tricks. If you use expandible, I wouldn’t go with the larger cuts. If 2 blade not over 2”, If 3 blade, not over 1 1/2”. If you select 20” arrows, consider whether the arrow being slightly past the Stirrup would bother you. 20” arrows usually do better on longer range. If you just “know” you’ll never shoot beyond 60 yards , choose the 18” arrows. Don’t aim at the same spot. 6 arrows should be enough if you’ll treat the arrows like equipment, not supply. Never shoot at the same spot when target shooting.
Though crossbow arrows are often mis-labeled “bolts” even by crossbow manufacturers, they are arrows in every sense of the word.