You can data migrate from below link,
First install Data migration from below link,
Follow each step of above link.
Now Steps for migrate data from Magento 1 to Magento 2,
There are not any new tools available for Magento 2.1.8 Release.
if issue solved, Click Kudos/Accept as Solutions.
It clearly states on http://devdocs.magento.com/guides/v2.1/migration/migration-tool-install.html
Make sure you are using the same released version of both Magento 2 and the Data Migration Tool. For example, for Magento version 2.1.2, you must also use the Data Migration Tool version 2.1.2.
So a tool will be released, for 2.1.7 it was released 2 or 3 days after the magento release. I assume it would be around the same time frame, so asking for an ETA.