Do I Make A Comment Thanking Them ? - Blog Posts

please help how does tumblr work it scares me sorry if i worded this weirdly but how will the twt refugees figure this shit out am i just dumb tumblr is so difficult to understand if smone reblogs my post and says they really like it in the tags how do i thank them for that ? do i reblog it back ? do i dm them ? do i make a comment thanking them ? am i coming off as rude for not thanking you all for your reblogs ? i really appreciate them but i have no idea how to work this hell site i just come on here to show you all my sillys and skrunklies and to look at memes when smthing interesting happens so how do i be nice to the people who are nice to me ? does it just not work ? am i missing smthing really obvious ?