My thinking was if most of the momentum is going to be kept from the ISS, then jumping away or toward the earth would still follow about the same curve from the original ISS momentum with some decay from drag/not getting boosted, like if I was shrunk down and riding a bullet fired horizontally jumping up or down I think I’d still follow about the same path as the bullet

but if it’s going to take a really long time long months or years then maybe a small change at the beginning could have a big impact?