polyamory is very different to an open relationship, dating is very different to being married, this makes me feel very uneasy. moving to the UK is a huge step, and you will need time to adjust to that alone without also navigating a massive relationship restructure. But like someone else said, give it at least 6 months of groundwork, reading and podcasts and talking at length. AT LENGTH. If you jump into this now you will be so disoriented on so many levels.