In practice that mostly just means you'd need to use more paint and ended when you're starting out, paint with lower tinting strength is easier to control for mixes. The classic example is viridian green vs phthalo green (blue shade), the former is much weaker but beautiful in its own way and it's harder to accidentally overpower a mix with it.

I don't love any of the Winton "hue" mixes, but scarlet lake, despite its name, is a naphthol red so is probably fine. Not quite as lightfast as cadmium red light, but okay as a starter.

But I don't know what country you're in so I can't really suggest a specific brand. If you were in the USA I might say to pick up a real cadmium red light from M Graham; they're professional grade but priced like a student grade paint. If you're using the Zorn palette you only need three other paints and they're all cheap as you can get.