I know it sounds good on paper or in the mind. But hear it from a person who has failed multiple times. Nothing is more unexpected then the unexpected. What if someone happens by. What if the current pushes you back ashore. Etc. I'm not telling you to do or not do anything. But the one thing worst then the need to die, is a failed attempt.
The world becomes numb after. And people judge you or condescend you even if you lose the will to follow through. I once swallowed allot of pills, and woke up 5hrs later involuntarily puking. I've cut my wrist so many times that I think I'm immortal. But the worst part is waking up to my shitty life with the added shame. To copious amounts of blood that doesn't come out of carpet. To the sore and stinging arms and the hands that don't work for a couple days.
Every time I tried, it was supposed to be beautiful, symbolic even. A simple peaceful soul fading into that deep dark good night. But every time, I was sent to the great nowhere, I met nothing, was denied, and was brought back. Even more disappointed and even more shamed to the point I have to commit.
What I'm trying to say is dont try if you plan on failing. Because when you do it becomes a life time obsession. And know matter how much you decide you might want to live, you'll always be biding your time.