Jota, thank you for your answer.
Buff, it is too difficult for me (and my computer knowledge).
I have created my Key Pair in EC2, that is easy.
Then I go to Amazon Lightsail to create a new SSH. Even I can download my private key (a .pem file). But I do not know how to finish this step. Have I to create a new instance? I would like my Key for an instance already create en AWS. I do not know how to follow.
And then, I go to Bitnami Launchpad for AWS Cloud and I do not see any Virtual Machines.
Can you provide me more information, a video for dummies, or something that can help me?
Thank you very much,