Common enough is advancer's new suit forcing & 2♠ as a diamond raise. You may not like that, you may prefer 2♠ as "unassuming".
Let's say partner's style is normal so 2♦ = near opening, often 6-carder.
Anyway, what is your plan? (EW take no further part)

Help

1♠ - 2♦ - no - ?