Hi Graham,
Sinking lines can be a bit tricky when you're learning the ropes, it's best to roll cast them to the surface first and then lift into a back cast before they get a chance to sink again. Next time you're out, keep an eye on how other anglers do this.
Yes, a sink tip would be handy for fishing buzzers and perhaps easier to get to grips with than a sinking line ..... and yes, the line will sit better if you can load it in the same direction as it comes off the packaging spool.
Best wishes
Mike