Hi there,
Yes, it is possible. Please add a page and save with whatever name you like. Then Go to Settings > Reading and change the setting and select the page which you have created:
Then use the Cornerstone on the homepage to add the blocks in question. You can also use the Recent Posts element to add whatever blog posts you like.
If you want to add only from one category to the recent posts you need to find the Category ID.
Kindly open up new threads for additional questions as it will help us to focus on each issue and give you a better support which you deserve. Having a long threads makes the maintaining job harder and also it will be harder for the other customers to find the correct information if they have similar issues. You are always welcomed to reply to this thread to follow up the same question.
Thank you.