Aliquis Quisquam quispiam

I’ve been learning Latin on my own for years. Some topics are hard to me. I can really deal with the different nuances in the meaning of ALIQUIS, QUISQUAM and QUISPIAM. Can anyone help me?

thank you from Bilbao (Spain)

Is Spanish your first language? If so, resources in Spanish might be more helpful.

A lot of overlap if we consider only the English glosses, but each tends toward a different context. From the OLD:

aliquis

An unspecified person, someone, anyone.

Quisquam

1 (in negative or quasi-negative context = quis2, quid, but usu. more emphatic)
a (m. or f.) Any (single) person, anyone (at all).

Quispiam

1 (especially in conditional, relative, or temporal clauses) One or other, an unspecified, some.