How to add a rail to my creek stairs?

I thought this might be the best sub, idk

I bought my house in November. I was diagnosed with MS two years ago and am unbalanced and my legs are weak, but I have kayaks, a canoe, and a Jon boat. And just love to sit by the water like pretty much everyone

I’m worried about my balance and yeeting myself into the creek. I’m not handy, I’m a lady lawyer. I’m guessing I’ll have to hire someone but if I have a good plan I can probably get friends to help

I’m thinking drilling into the railroad ties and installing some kind of post on like every fourth step, then run a rope or some other handle through them? That’s the best I’ve come up with, if any of you kind folks have suggestions that would be amazing. Thank you!

Pics: https://imgur.com/a/7GFSw37