I'm heavily debating over reading manga again despite what I've read and seen...what should I do?

Are you contemplating rereading something? Your post isn't very clear.

I second the request for more details.
What was the issue that stopped you from reading?
Are you looking for recommendations or just reasons to give it another go?
Are you interested in something specific (theme, genre, art style)?
All in all, how can we help?
- A little vague and hard to approach. Manga, just like western comics/books/movies/etc is such a broad medium you'll always find something you won't like. It's pretty much a case of learning what to avoid.
  Following from above, why? Because like in other types of media you can find some fantastic stories that might resonate with you. Or to engage with topics approached from a different cultural point of view. Or maybe just to enjoy the art. There are many reasons people love manga (and yes, stupid and/or fetishistic series are what some people look for).
  I'd be lying if I said I'm knowledgeable enough to suggest some older classics. I'll leave this one to the veterans.
  Now onto suggestions...
  I'm not familiar with Hoopla but here are two series found from a quick glance:
  A Silent Voice - story about bullying, repentance and healing. Can be pretty rough.
  Blame! - is a sci-fi series consisting of a lot of wordless walking through a deserted mega structure punctured by occasional fight scene. I don't remember it being too edgy but it's been a while since I touched it.
  If you're willing to check elsewhere, whether it would be on Mangadex or official apps, I could also suggest:
  Girls' Last Tour - a post post post apocalyptic story about two girls traveling through ruins of a dying world. It's a slower, contemplative series about existence and various mundane things humans don't think about.
  Sousou no Frieren (Frieren at the Funeral) - one of the big ongoing series at the moment. A more... thoughtful (?) take on fantasy with focus on human relations. Limited action, big on joy of adventure and nostalgia.
  The Girl From the Other Side: Siúil, a Rún - story about a young girl living with a wendigo-like caretaker. Pretty unique art style.
  I think these should be relatively safe to try out.
  Edit: I've seen you mention being a christian and disliking some themes because of that. Is there anything specific you'd like to avoid?

Manga is a broad medium. I would either scroll around and see what you like and drop it if it's not good or ask for suggestions with some aspects you want. There's lots of trash but when you find some good ones, it's a great feeling.

As a general rule I just try to work out if an activity adds more to my life than it takes away when deciding how to spend my time. Is there something you'd rather be doing? Is reading manga affecting your mental state?
If only some manga makes you feel bad, consider asking for recommendations and if something bothers you just stop. If you feel bad because of social pressure or something, another general rule for me is as long as you aren't hurting yourself or others then do what makes you happy. In the interest of free speech, others can state their opinion if they want and piss off if they become bullies about it.
- Why would you start reading something called Zombie Land Saga where the main character becomes a zombie almost instantly if you weren't into zombification? You had plenty of warning signs.
  And why did you lump transgenderism in with minors? They aren't remotely similar, and it's worrying you seem to think they are.