Is we a singular pronoun

No, the personal pronoun 'we' is a plural pronoun, a Word that takes the place of a noun (or nouns) for two or more people as a subject in a sentence.

The pronoun 'we' is the first person, plural, personal pronoun, a Word that takes the place of of a noun (or nouns) for the person speaking.

The corresponding first person, plural, personal pronoun the functions as an object in a sentence is 'us'.

Examples:

The Boy Scouts volunteered to do what we can to help.

You and I can finish this if we work together. It will give us a feeling of accomplishment.