A couple years before I even started publishing, I was drawing my comic just for laughs, and to experiment with my skills on a digital tablet. I was basically doing it just for me, you know? After I got a story arc going was when I thought about publishing onto Tapas, which was technically 3 years after I had first put the pen to tablet (Yep, worked on it on and off for a bit.) I had major burnouts, still do, but what really carried me through the hard times was the big "Why?". Why am I publishing a comic online for free when I could be doing something more useful as a hobby? Simple, I wanted to tell a story, initially based off a silly pun, later including drama. Not to mention experiment with webcomics (style/formats to see what is favored), mirroring (publishing on more than one site), and online marketing (which I suck at)
Guess, bottom line, it boils down to getting started and having not only a passion for your story/audience but for learning as you go.
Like numbers? Some personal stats:
I published around 46 episodes (one page or more each) in my first year(2023). I got a stat boost in July, 2023 when I joined the forums and started sharing my story along with advice, personal experiences and overall funny stuff (also did a drawing thread in October that year). Got 66 subs my first year.

2024: published 27 long eps (not a great year irl, lol), but I had a handful of dedicated readers by then. Gained 38 subs (then lost a few which happens. My flagship series has 82 subs right now)

So, it's kinda a mix of quantity and quality. Statistically speaking, you may get lucky and surpass me within a shorter time, and things are guaranteed to build up. But you'll never know unless you start.