off course,Blog commenting is good for PA of your site but you should select blog that are related to your niche or topic.
If you want traffic follow these tips 1-post unique and valuable content 2-do on-page and off-page SEO 3-engage yourself with social media happy...
ok check your sitemap.If it is ok,then just wait some time it take few days or weeks to index your post.
If you are using google search console then you can use fetch as google to get your posts indexed fast.
Separate names with a comma.