How difficult is it to learn Sanskrit to read the holy scriptures?

I am not indian nor I speak any indian languages but I'm a Hindu, and unfortunately very few scriptures have a translation to my native language, and the translation sometimes tries to treat the scriptures as a "philosophy" and dismisses/ignores it's religiousness (sorry if that's not the right term) for example, I bought a copy of the Bhagavad Gita and right at the beginning they said that they didn't want to approach this book as something religious (which it is!) which made me be uncertain of how accurate the translation was. So for that reason I thought about learning Sanskrit to be able to read the scriptures in their original language, but I'm not sure if that's something feasible, I love learning languages and I have some experience with old languages since I study and know some Latin that I use to read old roman books/scriptures. But my native language (Portuguese) came from latin so it helped a bit. Anyway, do you think that that is a good idea or would take many many years to be able to do? After studying Italian for example, for 3 months I was already able to read simple books (like the little prince) and understand most of the dialogues when I watch a movie in Italian, but I imagine that it would be much more difficult to understand religious scriptures. What do you think? Do you have any tips or resources to learn Sanskrit that are in English (or Portuguese)?