Resources according to WTS syllabus (Latin by Professor Rester's):
Free online: https://www.textkit.com/greek-latin-forum/viewtopic.php?f=6&p=213636
GREEK
Easy to understand tutorial on Greek: https://www.ntgreek.org/learn_nt_greek/inflect.htm
LATIN
Learn to Read Latin by Andrew Keller
Second Latin: Preparation for the Reading of Philosophy, Theology and Canon Law by Scanlon
Modern Greek Keyboard Layout:
Latin lesson:
I shall attempt first with Benjamin L.D'Ooge's Latin for Beginners, available on archive.org, referenced by textkit.com.