If you feel like you should rewrite then edit the chapters and then post a special chapter telling your old readers that you updated the story. Or put the story on pause and edit it. Sure, losing audience sucks, but if you carry on with the story you'll just keep the old readers and won't be able to gain new audience. If you really feel that you should rewrite it, then rewrite. Also, to keep the storyline under control, draw out your story before writing it. Or you can decide to add lots of drama every 15th chapter (or every 10 000 words).
In the end, you're the one to decide.
I searched your novel just now. I didn't click read yet, but what turned my attention is your synopsis. First thing I advice you do is rewrite it. Asap. When readers search for books, what they see are the first three lines (i think) of synopsis. So start it with action. If you want to say that's your first book then write it in the end.
That aside, how about exchanging reviews of out novels? Mine is https://www.webnovel.com/book/12522840205740905/Born-In-Blood. Tell me if you're interested