Not sure why you’d want to go as they do not have valid sacraments. Not to mention that you cannot fulfill your Sunday obligation. Now, if there is no Catholic church available then there is no way to satisfy that obligation. So I would suggest praying the Rosary and perhaps Stations of the Cross.
Before Vatican II we were strictly forbidden to attend non catholic services w/o permission. It was considered grave sin.
Today it is not sin, but unfortunately most protestant churches deteriorated to much worse level than the progressive Catholic Masses.
Once (before the GPS age) I was out of nowhere, and I found a ‘Five Point Evangelical Church’. I expected a strict Calvinist service, and got some reading form the Bible, a short sermon, an mostly the productions of the local people. It was a community gathering with some biblical passages.
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