Theme development

Hi I'm new here, also new to Drupal

I cannot find Bootstrap sub-theme I followed all the steps, have been at it for hours (14 hours over 2 days to be exact, no exageration) (fully frustrated) It has gotten to the point where I cannot think for myself anymore I need help.

I am a web designer that has been hired by a company to rebuild their website. I have hand coded the site, and its 90% done but now they are asking my to move it over to Drupal because the head devs want to start implementing it as a CMS. I have never used Drupal before, and I am having a real hard time understanding what I have to do to get the site operational. I am overwhelmed with the capabilities of Drupal, and I really don't need most of the extra's that are available. I have tried to watch tutorials, I have tried installing themes and editing them but I am really getting no where.

Hi all, I hope this is the correct place to post my issue. I've scoured the forums and have found problems similar to mine, but I simply can't figure out what I'm missing. I've been running Drupal on our departments website for 6 years now, starting with 6 and migrating to 7 successfully.

It seems that page title is printed in {{ page.content }} ... How can I separate the title and the content of the page in this template file, how can I print title and content separately?

How can I properly set a class for body tag for the front page?
mytheme_preprocess_html() have an access to body attributes, but it doesn't know if the page is front.
And mytheme_preprocess_page() have is_front, but I can't set attributes in there.

Hi community,

i am absolutly new in Drupal and came from ModX.
My question - so simple it seems to be - is just,

how can i make an new (twig) theme from scratch with bootstrap ?
i created a new theme folder called /sly with a sly.info.yml and the following content: