If an immediate Open Access publication isn’t possible (Gold OA), there may still be the option of Self-Archiving or Green OA. You can choose from a selection of options, depending on the choices your publisher is offering.: self-archiving your article on your personal website or in an institutional repository like Alexandria.
As an author, you will retain certain rights. Therefore, it is recommended that you check a journal’s policy regarding which rights you will keep, e.g., personal reuse, scholarly sharing, self-archiving rights, embargoes etc. You can also check the relevant policies with Sherpa/Romeo.
Additionally, this information should also be a part of the Copyright Transfer Agreement that you sign with your publisher, make sure to read it before you sign.
Please take note: if you are planning to self-archive in Alexandria: depending on the deposited version (preprint, postprint, published version), different embargo periods may apply.