Here’s everything you need 🙂

1. Listen

2. Watch

3. Go, for free, or <£15/day to start

https://www.findacrew.net/

If you’re sensible and keen to learn, you can do a few trips paying just your flights. With more experience and a few RYA exams, you can be paid for your time and all expenses, including flights. Adding a scuba-diving certification would increase your value, and fun!