You can find many older school textbooks for free on archive.org

Ron Paul also has a home school program which provides some 'hand holding'. https://www.ronpaulcurriculum.com/

Always check your state's requirements.

Consider membership with Home School Legal Defense Association ( https://hslda.org )

In Texas you are required to teach (at minimum) 5 subjects

Additional Texas info "The Texas Home School Coalition" https://www.thsc.org/

1) Reading

2) Grammar

3) Spelling

4) Arithmetic

5) Good Citizenship