Your question is somewhat general but here is an attempt to make it a little more clear and answer it.

copy core/themes/classy/templates/page.html.twig to your theme's template directory and name it page--front.html.twig and you can modify it as you like

but perhaps a better approach would be to do it in a modular way.

Find appropriate modules that give you desired functionality (slideshows etc) and most of them will allow you to create BLOCK(s) out of them and then you can add those blocks to any page you want but in your case it would be <front>.

So you front page could be made out of blocks from slideshow module and or views block(s) or even custom blocks (/block/add) or any other block.

Here is an example of how to set a block to display on front page

Your front page can also be made out of a basic page and then setting it as front page on Configuration > system > basic site settings > FRONT PAGE > Default front page (admin/config/system/site-information). Blocks can still be placed on front page even if its a basic page.

Your question is somewhat general but here is an attempt to make it a little more clear and answer it.

You can probably copy core/themes/classy/templates/page.html.twig to your theme's template directory and name it page--front.html.twig and you can modify it as you like.

Perhaps a better approach would be to do it in a modular way.

Find appropriate modules that give you desired functionality (slideshows etc) and most of them will allow you to create BLOCK(s) out of them and then you can add those blocks to any page you want but in your case it would be <front>.

Your front page could be made out of blocks from slideshow module and or views block(s) or even custom blocks (/block/add) or any other block.

Here is an example of how to set a block to display on front page

You can also create a basic page (or any content type) and then set it as front page by going to Configuration > system > basic site settings > FRONT PAGE > Default front page (admin/config/system/site-information). Blocks can still be placed on front page with this approach.

Your question is somewhat general but here is an attempt to make it a little more clear and answer it.

copy core/themes/classy/templates/page.html.twig to your theme's template directory and name it page--front.html.twig and you can modify it as you like

but perhaps a better approach would be to do it in a modular way.

Find appropriate modules that give you desired functionality (slideshows etc) and most of them will allow you to create BLOCK(s) out of them and then you can add those blocks to any page you want but in your case it would be <front>.

So you front page could be made out of blocks from slideshow module and or views block(s) or even custom blocks (/block/add) or any other block.

Your question is somewhat general but here is an attempt to make it a little more clear and answer it.

copy core/themes/classy/templates/page.html.twig to your theme's template directory and name it page--front.html.twig and you can modify it as you like

but perhaps a better approach would be to do it in a modular way.

Find appropriate modules that give you desired functionality (slideshows etc) and most of them will allow you to create BLOCK(s) out of them and then you can add those blocks to any page you want but in your case it would be <front>.

So you front page could be made out of blocks from slideshow module and or views block(s) or even custom blocks (/block/add) or any other block.

Here is an example of how to set a block to display on front page

Your front page can also be made out of a basic page and then setting it as front page on Configuration > system > basic site settings > FRONT PAGE > Default front page (admin/config/system/site-information). Blocks can still be placed on front page even if its a basic page.