Hi Dan, and welcome to the site.
I’m Iestyn, the man you’re hearing on the course, so I’m the one to blame if you can;t hear a word clearly etc!
Actually, that’s not entirely true. Part of the strength of the SSiW way to learn is that it trains your ear to start hearing the subtle differences in the language that you would just gloss over if you were reading and listening. This is why you’ve taken so long to do the first 22 minutes - you’re adjusting to a whole load of new stuff. It’s not just the language, but the method as well, because it’s highly doubtful that you have learnt anything purely by ear since you learnt to read.
But don;t worry. “so long” is actually a very short time, and if there wasn;t a counter on your mp3 player, you probably wouldn;t be worried about it!
It looks like you’re off to a great start, because you are obviously doing things right, including coming to the forum and asking for advice. As Carole says, you will continue to mix words, but they will be different ones as you progress. You’ll make some cracking mistakes - enjoy them! In fact, make more of them, because the more mistakes you make, the more progress you’ll make. And have fun.
It’s interesting that you ask is it worth it. I think that depends on why you are learning Welsh. The achievement on it’s own is worth it to some, but for others, taking part in Welsh language life is what makes it so important. For others it’s the community feel here. It’s purely personal. What i can just about guarantee is that if you put the work in, you’ll get results with this course. Unfortunately that’s not always true with language courses generally.
Finally, you ask about other websites and books. I would advise you course-wise to stick with SSiW and not do anything else until your getting comfortable with the basics - lets say lesson 10-15 or so. I’m not trying to stop you going to “the competition” ro anything, it’s just that we are very different to anything else out there, and if you start mixing things too early, it can cause confusion. It’s amazing how a tiny bit of doubt can de-motivate you completely. Get on to BBC Cymru and S4c, of course, but remember that some find them really helpful, and others just ind them frightening at this early stage.
As others have said thoug, definitely don;t read! If you’ve not had much exposure to Welsh, trying to read beofre you can speak will do you no good at all, and could do quite a bit of harm to the development of your accent and natural pronunciation.
Mostly, though, enjoy.
We have a number of HowTo guides, including How to learn the SSiW way, available in the FAQ section (top left of this page). you may find some of them helpful.