Hello,
Unfortunately you cannot.
This 30-day delay is intentional. It’s a security safeguard designed to protect users in case someone else tries to hijack their account by changing recovery info. The wait gives the rightful owner time to notice and stop unauthorized changes.
Unfortunately, this policy cannot be bypassed. You can read more about it directly from Microsoft here:
If you must use the computer now, you will have to do a factory reset/clean install to start over, and set it up with a different account for now, wait 30 days and link your current account back. By doing so, you do lose all of your files.