The problem with all social media, blogging, and podcasting is the time that's required to build your online presence. Unless you are already a famous celebrity, or else you pay a vast fortune to promote on platforms, it doesn't really matter how interesting/funny/clever you are, because the algorithms mean that no one will read it. Until you have hundreds or even thousands of followers you are speaking into a vacuum. You need to have followers who will re-post, re-blog you to begin with. You have to commit to a long haul. Only a rare few people get something that goes viral and that is largely by pure luck.
I speak not as an author but as someone managed several different social media accounts, and who has taken about 12 years to create a 40k Twitter account (that is now dying anyway because that platform is being mis-managed and people are still leaving it in droves.) However, I did read all the advice, even went on a courses, including one at Twitter HQ, and did all the right things in those earlier days. And it's harder now than it was 12 years ago because rules and algorithms have all changed.
Facebook, Instagram are slightly better, but my point is essentially the same, it takes a great deal of your time to craft and build your account, and wouldn't you rather be using that to write books instead?
One workshop made us make a list of why we were on social media and to prioritise what we wanted out of that. You can then use that to make sure you are always on message and to measure if you are succeeding. I still think that was good advice. However, if you are using it for marketing/promotion, in the end you are spending a lot of your time doing something other than the thing that you really want to be doing. And when Twitter no longer supported free access to the their API last year, thousands of businesses became unprofitable overnight without much warning, so all your hard work is bound to a platform that could suddenly disappear for any number of reasons beyond your control.
If you love and enjoy Blogging/Podcasting then you can treat them as a fun hobby, but using it as a way to promote your books is not an efficient use of time. Joining SFF Chronicles was probably a better move.
Edit: Just to add that by "promote your books" I did mean "sales." You quite obviously must have an online presence as an author, or anyone, in todays world. You need a website at the very least, because readers want to know about you and who you are, and you probably need somewhere to answer questions, which social media probably does far better than a website. Static websites get much less traffic than they did, unless they have lots of new content and download links, and they take up time in maintaining, and they cost money to host. Forum software costs more money. Facebook is "free" (except there is no such thing as a free lunch and they make money from your digital footprint.)
So, you do need to promote yourself and your latest book somewhere, just remember that "followers" are not book "sales."