Welcome to Textkit! I started with Latin in school and then learned Greek on my own.
However, see this discussion “Is it a good idea to learn Latin and Greek at the same time?”
Some tips:
- Be sure you are familiar with English grammar first (I assume you are a native speaker): subject, object, tenses, moods, participles, prepositions, etc., etc.
- If you plan to teach yourself Latin and/or Greek, get a course that has a key to the exercises.
- Be sure you work, at least a little, every single day. Like the ancient painter Apelles, you should never have to say:
Nullam hodie lineam duxi!
σήμερον οὐδεμίαν γραμμὴν ἤγαγον
Today I didn’t draw any line. - Bona fortuna, ἀγαθῇ τύχῃ, good luck!