You should follow the instructions as it says in the first error message. Search for h1 element and id, if you dont know what it is saying there.
mdn web docs and w3schools are useful for that.
Happy coding and take a rest if you need. Some days it is better just stop earlier and go for a walk or do another things
If you have a question about a specific challenge as it relates to your written code for that challenge, just click the Ask for Help button located on the challenge. It will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.