- Edited
First of all, sorry for the late reply and thank you for your explanation.
I think I like your story already. What matters to world building though is that it needs a bit of time to iron the details.
I personally hate it when authors start bringing things from their arses just because they didn't plan enough for either a world lore or MC powers.
My advice is to take your time. Rushing is never good, that is if you enjoy the process.
If it seemed tedious then just make it as simple as possible so it won't come to bite you back later.
About the MC, I honestly won't mind someone with tragic life as long as he could have some happy moments in between.
Just keeping the pace from a tragic incident to another would most likely repulse readers.
You should try to control the pace in between so you won't fall into the cliché of the always miserable, unlucky MC.
One last thing is that you said you would write 50 chapters before posting...
That I honestly wouldn't recommend unless you were a fast writer.
Posting your chapters after writing 20 or so would help a lot by motivating you from the feedback you would get and also your readers may notice some mistakes or plot holes.
Well, unless you have someone besides you that would read your book and provide opinion.
That's just my opinion though so take it with a grain of salt, no grains of salt.
Anyway, keep writing. Looking forward to seeing your novel