I have a couple dozen old Roman coins. They likely originated in the Levant/East Mediterranean and I am trying to learn what I could about them. I took a few pictures here, but besides seeing the outline of the face on the coin or a couple of letters, it's hard to make out more detail.
I am looking for help identifying these coins, as well as guidance or resources on how to identify old coins in general.
All of them are super worn, and without having the diameter for each of them I can only give you some starting points (going by the order of the photos):
1 - probably a sestertius of either Severus Alexander or Gordian III
2+4 (I think those two are the same?) - Byzantine follis from Constantinople, probably 6th century CE
3 - Bust style and remaining legend (TRAIANO?) suggest bronze coin of Trajan
6 - Bronze prutah from Judaea, most likely minted in Jerusalem in 37-43 CE under Agrippa I, grandson of King Herod
7+8 (9 too?)- Ptolemaic bronze, probably 3rd century BC
11+12 - Islamic or maybe Indian, not at all my field of expertise
Without prior experience in this field, identifying ancient coins in this condition will be borderline impossible. The easiest way to learn would be buying some unattributed/unidentified late Roman bronze coins (3rd & 4th century CE). These can be bought for very cheap in great condition, and are a lot of fun to indentify through online resources like Tesorillo.
Check out /r/AncientCoins as well.