How to connect into RMAN tool in Windows?

Press Windows button + R and press cmd then click "OK".
Write down "rman" and press enter

Lastly run that command to connect environment.

RMAN> connect target /

connected to target database: XE (DBID=2732638794)

How to set DB ID in RMAN?

RMAN> set dbid=111111;
-- 111111 -> desired dbid

How to delete archive log files until specific time in RMAN?

RMAN> delete archivelog until time ‘SYSDATE-10’;
i: it will delete them until 10 days ago

Also it has a no prompt option;
RMAN> delete noprompt archivelog until time ‘SYSDATE-10′;