(I know this song doesn't really belong on a guitar tab site,
but if you play the song with these chords it sounds very good:)
D Em C G
(all over again)
(Could it be more simple)
(There's also a lead guitar in the song that does sth like this)
D Em C
E|------3--0-----|------0--3h5p3---|-----------------|
B|----2----------|----1------------|-----------------|
G|--3------------|--0--------------|-----------------|
D|---------------|-----------------|-----------------|
A|---------------|-----------------|-----------------|
E|---------------|-----------------|-----------------|
************************************
| h Hammer-on
| p Pull-off
************************************
Source: https://tabs.ultimate-guitar.com/tab/2pac/dear_mama_chords_936700