To make this as a profession takes years, networking, patience, personal growth, growing a readerbase, and sheer luck.
As someone who has managed to make this my part-time profession after 5 years, I can tell you that you need massive numbers to even make it part-time, and that's from the Premium stand point. Those who manage to make this a side gig, on both Community and Premium, usually have other means to make money with their work, like Patreon and Ko-fi. Even then, a big readerbase is needed so they follow you there and donate/subscribe.
If you're looking to make writing a full-time profession, like Turtleme, then I can only suggest starting on Community and working your way up with a story that stands out in the crowd—genre, cover, story quality, etc. Research the platform and see what's been performing well.
I know this sounds kinda harsh but it's the reality of the webnovel and webcomic industry.