I tried log in to your site using shared credentials but i am getting error message that the login details are incorrect.
You can display full content of all the posts instead of excerpt as described on the below topic.
https://colorlibsupport.com/t/show-full-post-on-front-page-instead-of-excerpt/#post-59474
If you want to make only first two posts full width then you will have to develop custom code.
Developing custom code for custom functionality is beyond the scope of support that we provide here.
If you are not a developer then you can consider hiring a developer to develop it for you. You can hire a developer from any freelance site. Colorlib recommends the developer https://www.upwork.com/freelancers/~011652ffec8865c6d5 http://freewptp.com/contact