Cant change port 25 in postfix

Hi, I'm quite new to Linode and Postfix. I'm trying to set up a mail server on my linode with postfix, dovecot and mysql. I have LAMP server with multiple sites on Debian 11.
I followed the guide https://www.linode.com/docs/guides/email-with-postfix-dovecot-and-mysql/ and https://www.linode.com/docs/guides/troubleshooting-problems-with-postfix-dovecot-and-mysql/ but still I can't send and receive emails. When I send an email to a gmail account, it tries to send via port 25 while I disabled this.
(connect to alt2.gmail-smtp-in.l.google.com[142.251.9.27]:25: Connection timed out)
I can telnet into port 25. I read about relayhost but I don't prefer this because I don't want to pay anything extra and be limited in my number of emails.

Part of my main.cf
# TLS parameters smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls= yes smtpd_tls_auth_only = yes smtp_tls_security_level = may smtpd_tls_received_header = yes smtpd_tls_security_level=may smtp_tls_CApath=/etc/ssl/certs smtpd_sasl_security_options = noanonymous, noplaintext smtpd_sasl_tls_security_options = noanonymous # Authentication smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_auth_enable = yes smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache Restrictions smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unlisted_recipient, reject_unauth_destination smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_sender, reject_unknown_sender_domain smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination

part of master.cf file:
========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (no) (never) (100) # ========================================================================== #smtp inet n - - - - smtpd 2525 inet n - y - - smtpd #smtp inet n - y - 1 postscreen smtpd pass - - - - - smtpd #dnsblog unix - - y - 0 dnsblog #tlsproxy unix - - y - 0 tlsproxy submission inet n - - - - smtpd #6000 inet n - n - - smptd -o syslog_name=postfix/submission -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_sasl_type=dovecot -o smtpd_sasl_path=private/auth -o smtpd_tls_auth_only=yes -o smtpd_reject_unlisted_recipient=no -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions= # -o smtpd_relay_restrictions=permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING smtps inet n - - - - smtpd -v -o syslog_name=postfix/smtps -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_sasl_type=dovecot -o smtpd_sasl_path=private/auth -o smtpd_client_restrictions=permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING # -o smtpd_reject_unlisted_recipient=no # -o smtpd_client_restrictions=$mua_client_restrictions # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions= # -o smtpd_relay_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING

Can someone help me changing postfix smtp port to something other than port 25 so I can connect with gmail forexample without having a relayhost? I already search a lot in this community and on Google. I tried a lot but nothing worked.