LOL, I know what you mean about the swimming! So I completed my tri a few weeks back, and I LOVED IT! I was a little nervous about the swimming, but decided to bite the bullet and plan to do freestyle the whole way and take breaks if I needed to. It turns out that I swam all 9 lengths (just 225) in total and actually passed two people! But that first hit in the water nearly took my break away! It was chilly, and my adrenaline just surged, but by the end of the first length, I'd pretty much gone numb and calmed down quite a bit!
I used my mountain bike, too, but should have paid more attention to the shape it was in... I only had the middle of my 3 larger gears and I paid for it on the hills. Definitely going to get that looked at before I do my next one. I'm saving up for a nicer beginner road bike, but I'm thinking it will be a while yet before I get it.
The run blew my mind.. I couldn't believe that I actually ran my best race pace EVER after having cycled those hills. I thought at first the distance was wrong! All in all, it was super fun, I learned a lot, and I'm looking forward to the next one!
(my swimming continues to improve, too... just needed time)
Don't think, just do