1. One has a to learn the physical skill to write different characters (some times). 2. Many times a language requires one to learn the physical skills of making different sounds and combinations of sounds with the mouth/tongue and throat. 3. One has to learn the skill of hearing and distinguishing words out of the amalgamation of them in the form of a sentence. 4. One has to learn the grammar of the language. 5. One has to associate the new words with the world around them; which would be vocabulary.
Most people think the last thing in this list is all they need to do and the rest will just happen - when it doesn't they get frustrated and give up. I think if they go into it knowing the different things they will need to learn and the different approaches to those skills that are best - we might have more successes.
I think exposure and actively speaking are the wrong categories - your learn a language by using it to participate in a common experience with another human being. For this, you both have to use the same protocol, and at the beginning, you have to figure out this protocol using a simpler fallback feedback protocol. This is something I am currently realizing as a father of a one-year old. This involves of course exposure and speaking, but I strongly doubt that you could learn a language just by listening to it and re-producing the words. I expect this would only result in text/speech resembling GPT-2.
I also think that you can have a common experience without actively producing text or speech, for example by watching a movie / TV show were you want to follow the story and participate in the lives of the actors. In fact, I know many people who effortlessly learned a second language by watching foreign movies and TV shows for years.
I think the way that we are able to process speech at that speed is that we essentially guess what words are coming next, which is really only possible if you’re able to construct the sentence yourself. If you stop a sentence at a random point a native speaker will be able to predict the kind of words that will come next, if not the exact words. Another bit of evidence for this theory is that if someone says something very unexpected and out of context we often won’t understand what they’ve said.
Now it’s possible that you could achieve this ability only through input and not through production but I believe that it will be much less efficient.
They're not forbidden to learn the meaning of Vedas. That is universal to all, as evidenced by the Dharma-Butcher - a butcher by profession who solves all philosophical doubts of saints. And he did speak in Sanskrit to the Rishis.
What they're forbidden is to chant the Vedas with original incantation. Because those chants have the power to invoke deities who control the forces of nature itself.
This is no different from restricting access to firearms for the general public. While most citizens shouldn't operate them, they are entitled to the protection offered by others who wield them. And those who wield them must have extreme restraint.
Brahmins, are known for self-control, patience, begging for alms, vegetarianism, and study of scriptures. Atleast, that was the case until a few generations ago. Now, they've left their traditional professions and gone into the IT industry, so they too lost the qualities/restraint needed to be entrusted with Veda mantras.
When one has self-control why should they beg ? Its contradictory ?
Coming to The Vedas themselves, they are quite voluminous and make for a very dry reading. The classic english translations are the ones by Ralph T.H. Griffith. Recently Bibek Debroy has translated The Vedas into english though i believe it is highly abridged and simplified. This might make a good starting point.