Giving uUp My Seat

Yesterday morning, I noticed that a high school student standing ion the train, graspeding the walking stick made of metal.

You could also say, “A metal walking stick”.

I gave up my seat for him since he mightappeared to have some sort of disability with his legs.

However, he was apparently seemed upset and was unwilling to sit oin my seat.

I felt embarrassed immediately after noticimmediately embarrassed after realizing that it might have been my　a misunderstanding on my part.

Even though Japanese people claim themselvesat they are as kind people, I can't agree with it.

If someone who haves a disability or is pregnant woman gets on the train, you can hardly see anyone who gives up histheir seat.

If you don’t know the gender of someone, people used to put either his/her or he/she (depending on what the sentence called for). However, more recently it’s become more common and generally accepted to put “their”, probably because it’s more inclusive.

I want to be a person who always gives up mytheir seat, even if I feel embarrassed.

Yesterday morning I noticed that a high school student standing ion the train grasped the walking stick made of metalwas holding a metal walking stick.

You could also say "a cane" or "a crutch." (Google images might help if you're not sure what those terms mean.)

I gave up my seat for him since he mightseemed to have some sort of disability with his legs.

What you wrote is correct, but "disability with his legs" sounds a bit unnatural (at least to my ear). In this context, it's clear that you mean he had a leg-related disability. You could also say "physical disability."

However, he apprently seemed upset and was unwilling to sit oin my seat.

I felt embarrassed immediately after noticing that it might have been my　 misunderstanding.

Even though Japanese people claimsee themselves as kind people, I can't agreeentirely agree with it.

If someone who haves a disability or a pregnant woman gets on the train, you can hardly see anyone who gives up his seat.

"Someone who has a disability" and "someone with a disability" are both correct. (But "someone who have disability" is not.)

I want to be a person who always gives up my seat even if I feel embarrassed.