having gone in the other direction...
if it is the UK, Judaism comes in 3 main flavours: Orthodox, Reform and Liberal. There are also the more extreme ends such as Chasidic community and I doubt they will want to know you. Orthodox Judaism follows the rules most strictly, the services are entirely in Hebrew and be aware that Saturday morning lasts 3 hours.
general rules are: Fri eve to Sat eve is a day of rest, that means very little is allowed. Dietary rules: mainly affecting meat, eat nothing without cloven hooves and only bits of that, fish only with fins and scales. Don't mix meat and milk.
Jews range from secular Jews (ancestry only) to the full wig for women and two kitchens, and all points in between.
Judaism doesn't proselytise and it is quite hard to get in. There are ways to convert fully, (I take it you aren't male???) and it can be done.
suggestion? Find a nearby Liberal or Reform community, get in touch, ask to come to a service. You'll probably be most welcome. One thing to be aware of; after the service, do not hang around in a group - Jews disperse rapidly. It has always been so. Also don't be surprised at seeing some of the larger members of the community standing outside in hi-viz, for the same reason.