Hi,

For the migration of the odoo database from one version to another version, the available option for free is to do with the Open upgrade project. If you are not okay with the open upgrade, you might have to go for third party paid service offering the same.

Open Upgrade: https://doc.therp.nl/openupgrade/

Also check out this db migration, using the tool Talend: https://www.youtube.com/watch?v=Fx3g0kDOwXU

For the modules, you have to manually migrate it, see this: How To Migrate Odoo Modules To Another Version

If you are using the odoo enterprise, you can use odoo upgrade service for this.

Thanks