Blog as home page w/o header

Hi,

I want my 1st page (after you enter http://www.chumbajamba.lt) would be this site https://chumbajamba.lt/blog/ —> how to make it?

Default settings is like this – they give 2 different pages, and i cannot make them the same one: settings —> reading —> Front page displays -> Static page -> front page = home, posts = blog.

If I change to settings —> reading —> Front page displays -> your latest posts
all is good except I get extra additional header (like 5 ch wide, black with my site title). This header is the problem, which i would like to remove. Where can I edit/remove this part?

If you look now to https://chumbajamba.lt/blog/ there is no additional header.

Thanks

Lukas