Hi there,
I need to know if it is difficult to replace my 1998 accord starter by myself, I also need to know if one of NSA will be good or I need to have an original honda one( starter). I surfed the internet and I haven't see anything original honda so far
I would really appreciate your help and Thank you in advance for your answers.
Have agreat day all.

It's very easy to replace the starter:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563.html#post219985

Call your local Honda dealer and get the Honda Part No. for the starter. Go online with that number and you should easily be able to get a genuine Honda starter for a very good price.

I'm not familiar with NSA but that doesn't mean they are not okay. With all aftermarket parts, some are excellent and some are not. I would try and get an acceptable price on a genuine Honda starter first.