I covered the subject pronouns recently.
A couple additional points are worth noting:
- Since the plural forms of the subject pronoun are used for a polite singular, लोग log “people” may be combined with the second person plural forms (तुम, आप) to distinguish polite singular usage from plural usage. If you can grin and bear it, think “you all” or even “y’all”.
- The third person forms can mean “this/these” or “that/those” rather than “he”, “she”, “it” or “they”. Distinguishing between “this” and “that” is as simple as picking the form for the right proximity: “v-” forms for distance, “y-” forms for objects and people close at hand.