Plugin that redirects the visitor to a different page of the website.

Hey all,

Sorry if the title is a bit confusing (it is for me), but let me explain what I am looking for.
Since I don’t use my website very much right now, I’d like to redirect the visitors to a page once the enter the main link to their browsers.
So basically once a person enters https://iiseptum.co.uk , I want wordpress to redirect them to a page like https://iiseptum.co.uk/new or something. However I still want to keep all of my posts intact and available for people with links from external sites (facebook, youtube etc.). I’m just wondering if that is possible.
So as a TL;DR:
1.A person types or clicks the URL (https://iiseptum.co.uk)
2.Is redirected to somewhere like (https://iiseptum.co.uk/new)
3.On that “new” page ill put up a bunch of stuff about me, my youtube, twitch etc. and a link to all of the old posts somewhere at the bottom (preferably without changing their original URLs since it would break the links on all external sites)

A huge thanks in advance for anyone that can understand this and maybe point me to a plugin that does something similar to it.
Thank you, thank you, thank YOU!