Misako Mitsumi, Extradimensional Barista

Strange woman.

No, I don't know either.

I think if the front legs are synchronized, there won't be any trouble with tripping, as shown in this post over here about horses in Fallout with extra legs:

But it is incredibly boring for all the six legged creatures to have such mammalian body plans, so here are some options:

(image description: sketches of six legged creatures. the first has a quadrupedal body plan with the extra front limbs being smaller and built like arms for grabbing. the second has the same body plan mentioned above, with the two front legs being close together and basically the same. the third one has a more insectoid body plan, with all three sets of legs close together near the bottom of the torso, and then spreading outwards from the body. and the final one is like an elongated lizard with an extra set of limbs in the middle of the body. end description)

Having one set of limbs be more grabby while the remaining two pairs are for running is probably one of my favorite options, especially if you want to create a believable sapient people species. Another option for bipedal movement is having two sets of grabby limbs and one set of walking limbs. which limbs get to do the walking and which ones get to do the grabbing is entirely up to personal preference, of course. I also went a bit more digitigrade/ungulate with some of these, but they could be plantigrade too! quadrupedal-type movement does not necessarily require tippy toes.

tail size/shape/existence optional.

I'll start by linking a post from someone who is better at horse anatomy than me lol

now, this fallout-inspired version only has six legs, which is slightly more practical than eight. but the post also includes an animated run cycle, which is super cool.

now, I really do struggle with normal horse anatomy lol they are not my strongest point. but I can try to do an eight legged horse.

(image description: sketch of a horse with the body parts drawn in simple shapes and a skeletal frame beneath the main outlines. next to it is a copy of the same sketch, now given more body length and an additional pair of legs in both the back and front. the additional back legs have a much smaller "pelvis" than the main back legs. end description.)