There aren't very many Product Demonstration jobs in County Dublin; the current count is just 2. Maybe, you could try slightly farther afield. The most common categories in this field are at the current time Python and Solution Architecture jobs. Jobs that involve Sales, Sales Process, and Presales are at the current time quite common on Jobspotting.
If you're just starting (or changing) your career, you'll be glad to know that 50% of Product Demonstration jobs in this area require little expertise. Find these job offers now by signing up to Jobspotting. It can be hard to find the right internship. Just because there aren't currently any available in this sector, doesn't exclude a plethora of possibilities in related areas. Recruiters are trained to find the best applicants for a given position. Most companies in this area trust hiring to them. Some applicants prefer to skip the middle man. If you're one of them, make sure to filter recruiters out of your Jobfeed. Have you seen which other skills are in demand in this region?