Mechanic noticed an exhaust leak when I was changing my oil. He pointed out the flex pipe and said the leak was likely coming from there and it was pretty rotted (see attached). It is an old car with about 75k miles. I will be looking to ship it to the US in 2 weeks so I’d like to/have to get this leak fixed.

I’m reading flex pipes are different based on year, transmission type, etc. I have a full shop I will be using to work on my car (lifts, basic tools, etc). I don’t have a lot of car experience (I’ve only done brakes, alternator, oil changes). Would love some assistance if anyone has a good YouTube video or tips on changing it out.