Changing your mind in public is easier when you never made that opinion your whole identity.

Holding a view and being a view are different things. Once an opinion becomes part of how you are known, updating it costs you social ground as well as pride, so you defend it long after you stopped believing it. Keeping a little distance between yourself and your positions is what leaves you free to move.

Notice which of your opinions you announce most often, because that is the one that will be hardest to drop. Try stating things with the certainty you actually have rather than with more. It is a small habit that keeps your options open.