How to obtain certbot ssl

Help
1

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:
studio-miranima.com
I ran this command:

but I use private ip and port-forwarding
sudo certbot certonly --nginx --dry-run
It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx

Which names would you like to activate HTTPS for?

1: studio-miranima.com
2: www.studio-miranima.com

Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel):
Simulating a certificate request for studio-miranima.com and www.studio-miranima.com
Performing the following challenges:
http-01 challenge for studio-miranima.com
http-01 challenge for www.studio-miranima.com
Waiting for verification...
Challenge failed for domain studio-miranima.com
Challenge failed for domain www.studio-miranima.com
http-01 challenge for studio-miranima.com
http-01 challenge for www.studio-miranima.com
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

My web server is (include version):
nginx version: nginx/1.18.0
The operating system my web server runs on is (include version):
Debian version: 11 (bullseye)
My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know):
yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
certbot 1.12.0

2

Let's Encrypt is a public Certificate Authority and needs to validate your domain control over the public internet. Your DNS is pointing to your private IP. It must point to your public IP

3

how do I get my website secure in the easiest way, can I use the DNS challenge? can you recommend me?

4

Do you want your website available on the public Internet?

5

no i just want to obtain ssl

6

How is anyone going to reach your site over the Internet [IP 192.168.1.101]?
What port(s) are being forwarded [and where/how]?