Would you please consider moving your blog from Substack to ButtonDown or Ghost?
They host this blog: Parents with Inconvenient Truths about Trans, basically children abusers. The CEO of Substack has argued for keeping letting self-claimed Nazis monetize their blogs and only had to back down due to the massive backlash; he's actively trying to let his company harm people for profits. www.pittparents.com/p/how-a-seemingly-innocent-gift-led (CW transphobia)
I need to stress out that this company will lead to thousands of deaths; this is why, as a Twitter survivor, I generally don't share Substack blog posts ‑ it might do more harm than good, and I won't take responsibility for their personal choices.
There are quite good Ghost themes, including Thesis and Nova.
If you preferred a static blog generator, you could have a look at Zola, which has a few top notch themes and an excellent documentation, definitely outclassing that of Hugo, FWIW.
My favorites are Duckquill (it supports Mastodon comments!) and Papaya, both have light and dark themes.
Setting up Hugo properly is rather painful because most of the "documentation" is scattered across user blog posts but again, that of Zola is pretty solid and should get even my ADHD brain up and running in less than half an hour. And then of course, you could host your blog somewhere (e.g. on the Tildeverse) and rsync it.
Alternatively, you could even use prose.sh, that's basically an OOTB host with a preconfigured theme, or – maybe this is somewhat of an unpopular opinion – Gemini if you only planned to use your online/AFK reputation to build your brand, which is how Google search ranking actually works, by the way. A technical-minded French-speaking audience has actually asked me how to read my posts and I've even been notified by SkyJake – the Lagrange developer – that using a Unicode domain name had helped him to fix a bug in his browser. This might be out of scope but I've received the most constructive, thought-through feedback during this era, promoting my Gemini-only blog on my own honk instance.