well that translates to 69kg, so either really, 80s would be easier to learn on, but you'd be bottoming them out a lot once you got used to them, 90s would be harder to learn on but there's more potential for height in the end, so a don't know on that one from me
other things, pads pads, more pads, bit of sense, quick release kneestraps or webbing to strap your knees in, if you'renot going for cuffs that is, don't think there's much more critical info