The biggest difference is between Roman Catholic and the others you’ve listed which are all Protestant - so don’t have anything much to do with the Pope and the Vatican.
Anglican is Church of England. But within that different areas (parishes) have very different styles of service.
High Church means a very traditional, formal service, lots of liturgy (bits that are read/repeated from a prayer book), lots of robes, lots of traditional song maybe with organ and choir, and probably some incense. People might talk about a Priest or a father rather than a vicar, and talk about Mass rather than communion.
I think RC is high church, and some Anglican churches are too, but some are also ‘low’.
Baptist churches I think are low church. No robes, probably no dog collar on the minister (priest), music probably from a music group with a guitar and keyboard. Service is likely to be relaxed, have a longer sermon, no liturgy and people will want to chat with visitors before/after the service.
Baptists big defining difference is that they don’t believe in infant baptisms/christening. They think the decision to be baptised should be a personal one and so happens for teenagers/adults, and they dunk the whole person in a specially built pool (giant bath) that usually hides under the stage at the front of church when not used.
Methodists I’m not as familiar with but they’re probably somewhere in between Anglican and Baptist!
Clear as mud?