There is no simple answer for this question. If I understand well, you want to switch from a plugin to another. If you are not comfort with SQL queries, you may try using some useful tools, I’ve used these in the past to achieve something similar:
Generally you will need to follow this logic:
- Backup your site database
- Transport plugin settings (usually the best way is to do it manually)
- Transport the custom post type (you will need a bulk conversion utility for post types, like Convert Post Types plugin)
- Rename custom post meta keys (You can use Custom Field Bulk Editor plugin)
Other resources: You can use Post Meta Inspector plugin to inspect post meta values, this will give you useful insights while transporting post meta fields.
Important! This process can mess up your database, mostly it won’t succeed from the first try, so you must not forget to backup your site database.
I hope this helps.