You can LARP as one, but you’ll never be Jewish. They still won’t let you immigrate to Israel.
I know several converts to Judaism who immigrated to Israel. One, a famous doctor from India, had to undergo conversion all over again, because the Ministry of the Interior didn’t recognize the rabbinical court who did his first conversion. He also had to remarry his wife. But in the end, he was accepted as an oleh chadash (new immigrant) together with his entire family, who also had to convert twice.
Israel has a normal immigration process like any Western country in addition to streamlined immigration for Jews.