The commenter below suggested using the vulgate and biblical Greek texts for latin and greek respectively. Is there something similar to Lingua Latina for Sanskrit?
https://secure.samskritabharatiusa.org/np/clients/sb594/gift...
If you don't know any Sanskrit below are couple of options -
https://www.amazon.com/Cambridge-Introduction-Sanskrit-M-Rup...
https://www.amazon.com/Introduction-Sanskrit-Part-Thomas-Ege...
This explains the link to LLPSI: https://www.reddit.com/r/latin/comments/knuc4h/a_sanskrit_pr...