Yes of course it sounds familiar —> https://www.wix.com/velo/forum/coding-with-velo/want-to-call-multiple-items-from-database-according-to-user-selection-can-you-help 
You have now some results in your console.
…open Item-Data and Tags and see what you can find inside the shown OBJECT and ARRAY (do not forget to show a screenshot of console-results, after you have opened them) .
BTW. Your code has 2x onReady(). You should eleminate one of them. Always just 1x onReady() in your code!