In your config there is 1 index, a Lucene index, a custom one named mymywebsite_assets
<contentSearch>
<configuration type="Sitecore.ContentSearch.ContentSearchConfiguration, Sitecore.ContentSearch">
<indexes hint="list:AddIndex">
<index id="mymywebsite_assets" type="Sitecore.ContentSearch.LuceneProvider.LuceneIndex, Sitecore.ContentSearch.LuceneProvider">
Check if the following step is done correctly:
Navigate to the website Include folder: wwwroot\{sitename}\App_Config\Include\
Enable the Sitecore.ContentSearch.Solr.*.config files by removing .example from the file name.
Sitecore.ContentSearch.Solr.DefaultIndexConfiguration.config.example
Sitecore.ContentSearch.Solr.Index.Analytics.config.example
Sitecore.ContentSearch.Solr.Index.Core.config.example
Sitecore.ContentSearch.Solr.Index.Master.config.example
Sitecore.ContentSearch.Solr.Index.Web.config.example
In your config I see currently only the "Sitecore.ContentSearch.Solr.DefaultIndexConfiguration.config"
Also on the doc.sitecore there is an walktrough specific to Sitecore 8.2 see https://doc.sitecore.com/developers/82/sitecore-experience-platform/en/walkthrough--setting-up-solr.html