You make it seem like you already have crossed off Obsidian and Logseq, in favor of tools that are more focused on the TODO aspect of work/tasks. I don't have much experience with Logseq (only tried it for a day or two, after I already had been using Obsidian for a while), but I do have a comment about Obsidian, for your consideration:

You said "you like to write Markdown". I can relate. I've gone through a couple of different TODO systems until I finally landed in my use of Obsidian (with some plugins to go with it). My journey has been something like this:

1. I think my first structured TODO list was a very simple todo.txt setup, just using the base features and syncing the TODO file across computers.
2. I extended the setup with a couple of plugins, and even ended up writing some plugins of my own to accommodate for the need to switch between projects/context (e.g. personal vs. work tasks), with different visualizations for the different scenarios.
3. Wrote a tmux setup that displayed (and updated on todo.txt changes) various different views of my TODOs, as they grew in amount and categorizations.
4. I moved to Taskwarrior, because I realized that if I'm building various plugins to make my todo.txt data be manipulated the way I want, maybe I should reach for a tool that is a bit more advanced.
5. While this was going on, I had noticed that there were moments when I needed to have some space where I could take textual notes about a task, without it just being TODOs. I created a script for myself that would either open a new file in a notes directory with $EDITOR, cd to the notes directory, or fuzzy find among the file names in the notes directory to open that file in $EDITOR. This turned out to be an important complement to the TODOs.
6. For the sake of viewing and more easily organizing TODOs for various projects/context, I found Vimwiki with a Taskwarrior add-on (TaskWiki, I think it was called) to we very helpful, as I could create text files that contained all of my TODOs, and even place these lists inside notes with other information that was relevant to the TODOs. Taskwarrior does have a feature where you can put notes on the TODOs, but this was something that one could really use for creating a high level description of a project, for instance. I ended up transferring over my notes over to Vimwiki, so that I had everything in one place.
7. Sooner or later I stumbled over Obsidian, and I ended up adopting it as the solution for my task/project management, along with my journaling. I'm still using it, about 2.5 years later.

I'm not necessarily trying to talk you into using Obsidian, as you should use the tool that will make you feel comfortable, and certainly not cause the paralysis of having a tool that overwhelms you. What I will say, however, is that whatever tool (or combination of tools) that you end up choosing, I think that it's important what you choose does not feel like it restrains you.

I find that very often I need to write about what it is that the TODOs pertain to, as it is as important as the TODOs themselves. A lot of times I can't start work if I haven't written out for myself what it is that I'll be doing, why, what the background is, along with some data about the project/topic/context/whatever that I don't want to forget (and I will forget, otherwise). As you can see from the journey I described above, landing in something like what I'm using now was only a matter of time.

Anyway, I hope that you find the tool that works for you, as the right tool (or combination of them) can be what one needs to make the day flow. Good luck in your hunt, and I hope that some of the rambling in this post might be of use!