How can we avoid unnessessary use of gender-specific pronouns?

Especially when people use screen names that don’t identify their gender and when we have no way to know if their significant other is male or female and we have no need to assume or ask, wouldn’t it be helpful to have appropriate and polite personal pronouns that were not gender-specific?

I wish our language had a non-gender-specific pronoun that clearly referred to humans in place of he, she, his, hers, him, her.

We could use ”zee” for both he and she.

We could use ”hoz” for his or hers.

We could use ”hom” for him or her.

Anyone care to adopt these conventions?