link in the posts are dofollow. There is dofollow comment or nofollow ?

i thinks it is good

I noticed that nofollow links also show up in google search console as backlinks, so those links could also do good to your overall SEO

No its not bad. But dont use paid backlinks.

If you are spamming comments on inrelevant blogs those links will be probably useles, but if you comment on relevant blogs from the same niche as yours it will improve your rankings slightly

Nice work, thanks for the solid answers guys

I think that is good if you get from blog that relevant to tour site

Blog backinks are also considered as quality backlinks.

it totally depends on blog content quality

Blog Back Links
 

getting back links from blog is not bad and it really help to get instant traffic but you should get back links only on those blog those are regularly do posting. that's will be more help full.

Definitely back linking your blog is a perfect idea but it comes with the condition that your blog must contain appropriate & attractive content.

If you get backlink from rich content blog then it may helpful to you.

It's good if your posts are quality. Remember one thing... DON'T SPAM.

Blog backlinks is good. But you should comment or post must me relevant sits.

Also, when you are building backlinks, you need to keep quality of links and anchor text variation in your mind. Also, instead of creating lots of backlinks to your homepage only, start working on building links to internal pages. You can start working on resource pages like “WordPress guide” and build links to them. This way, you can also target Single or double word Keywords easily.