Latin before Ancient Greek, Ancient Greek before Koine. Latin grammar will give you a good starting point before moving on to Ancient Greek (avoid Homeric for now). And Ancient Greek will give you a solid foundation from which to learn Koine. A useful online resource for both Latin & Greek is
Textkit. They provide free e-books under their Library tab and a forum in which to ask questions.
I would start with
Latin For Beginners, &
Latin for Beginner’s Key, Benjamin L. D’Ooge. After finishing these I would move on to the following:
A New Latin Prose Composition, Charles E. Bennett and
Latin Prose Composition, North and Hillard. After finishing D'Ooge you should also begin
New Latin Grammar, Allen & Greenough. These will give you a solid foundation in Latin and will cover a period of two to four years of learning.
For Ancient Greek I would start with
First Greek Book, John Williams White & his key
First Greek Book Key. Follow these up with
Greek Grammar, William W. Goodwin &
Syntax of the Moods and Tenses of the Greek Verb, William W. Goodwin.
For Koine I'd start with
A Brief Introduction to New Testament Greek &
A Brief Introduction to New Testament Greek Key, Samuel G. Green.
Both the Latin & Greek sections have reading selections. You will also find reading lists and standards which you can modify to your own needs here:
Doctor of Philosophy Don't be intimidated by the the title. It's a good reference of material and skill tests.
The reasons for learning Latin prior to Greek can be multiplied, but simply put:
- You already know a lot of the Latin vocabulary.
- You won't have to learn a new alphabet at first.
- Similarities between Greek & Latin grammar.
- Learning Latin will also help your Greek vocab.
Though Greek influenced Latin and Latin English, it is generally easier for the English speaker to go from English to Latin to Greek. It should be noted that point 3 is only in reference to generalities. Once you get more involved in both languages you will notice differences in such areas as the cases for one.
If you want to learn Hebrew after these two, I'd recommend Elementary Hebrew Grammar by William Henry Green available online for free at either Google Books or
Internet Archive: Digital Library of Free Books, Movies, Music & Wayback Machine to begin with.
Hope these help. You should also check out the Latinum channel on Youtube.