Plan on traveling Between June 13-16 2023. From Venice to Minterossoa Al Mare and later Monterosso to Florence. When will the schedule be available?

I will be in Monterrosso al Mare until June 14. I was able to book advance tickets through Trainline because I was nervous about waiting until the ticket window opened on the Trenitalia site. I think that was not necessary. Look about 60 days out I read.