>>721074708
I am NOT good at video games. What I am good at is bashing my head against something until it breaks.
It took me 63 hours on a casual playthrough to 100% the game; lace 2 took me at least a hundred tries.

What helps is getting enough sleep so your brain can consolidate all that muscle memory.
Aside from that I recommend 100%ing as much as you're able before tackling harder challenges.

And if you want to attempt steel soul: look up BlueSR's speedrun route and always save and exit to menu when you reach two masks up until you get the Fragile Mask.
It took me 20 hours to finish a 3 hour steel soul speedrun. I think I have around a hundred hours in the game at this point?
>>721074752
Nothing in the game is missable except for two optional Hunter's Journal entries.
They are the two duels between Shakra and Zazabart: the former can be fought right to Bellhart after doing her wish, the latter can be fought in the area to the right of Songclave.