Make sure you’re giving the yoyo enough momentum to swing around and also make sure that you’re releasing at the right time and point. I don’t know what tutorial you used to learn it but I think the tutorial on definitiveyoyoing.com does a great job of explaining the details of it.
If your issue is with catching the counterweight, that’ll just come with practice.
As for what to use, I think the Kilter is great for 5a, it’s actually what I use myself. I don’t think the Speedaholic would be very good for it. It’s not very stable or forgiving.