To answer you Ask Selina question, dolce does mean sweetly but we should not consider that as purely a physical position on the guitar. In fact playing where you describe would be more appropriate for the instruction Tasto.
The description sweetness is for the musical feel of that phrase or section and it is up to the guitarist to interprete. We can achieve good variety of tone or colour, while hardly moving along the string, by changing the angle or strength of our attack. The length of a dolce instruction will not be determined by another instruction but more likely by the phrases in the music.
Using a tasto sound is certainly an option but often that can be too extreme for what is required.
Good luck!
Selina