Hey OP. Like mooderino, I have one of the fastest growing new stories, which sounds incredibly arrogant and I threw up in my mouth a little just typing that. Most of my "success" (I'm making air quotes here too) I'm pretty sure is based on luck, but hopefully some of the things I've done over the last few months have helped, at least a little. I'd like to think that everything isn't the result of the universe playing dice with my life, but I'm not willing to rule it out. That said, I will pass on what I think I've learned about web serials in in the off chance my life isn't just the flotsam of the cosmos.
Not to discourage you here, but everyone does it differently. I personally upload to multiple platforms and I don't consolidate my reader base. Some writers stay in one location, some writers try to draw people from multiple places to a website or a particular site for whatever reason.
There doesn't seem to be any rhyme or reason to what works.
However, I will repeat some fantastic advice I got from some of the established community here: Write a lot. Regular updates are not only the key to getting a viewer base in the first place, but garnering the loyalty we all value in our readers as well.
I'm going to echo the sentiment that you should get your work approved for this site ASAP. Being a part of WFG and TWF has been phenomenal for acquiring readers. It is not inaccurate to say that being part of this community was one of best decisions I ever made to improve the promotion and quality of my online work.
In many/most ways, writing a web serial (or having a web comic for that matter), fosters a very intimate connection with readers. It's one reason I think what we /all/ do here is more art than science. It's a lot more complex than just creating an input towards a desired output.
There are a mind-boggling number of variables involved in being successful or not in this medium and I won't lie to you; there is a huge learning curve.
In the last year, I've learned how to create websites, promote, create my own maps, promote, work with artists, set up crowd funding, create rational linking, promote, search for new ways to interact with fans, find new plugins for my website, grow as a writer, and did I mention promote? This has been one of the most challenging learning curves for anything I've ever decided to do, but it's been incredibly rewarding.
TL:DR: Instead of a blanket question of what you should do, I would suggest finding a writer or two you respect and ask what questions you should ask.
You will get a lot more data from specific questions than asking how the entire process works (because it's a massive undertaking). For me, quite a bit of my journey since Jan. has been discovering where the holes in my self-education are. This has allowed me to ask the right questions to leverage the massive amount of experience found in this community.