This may not be the answer you want but I am skeptical of any website being around for very long. I would get something that can control a chipping and etching tool capable of carving designs and words into extremely hard rock, then find caves that go deep into mountains that are at a high altitude to leave behind whatever was on my mind. The reason I would go for high altitude is plate subduction or ocean level sea rise could submerge some caves at or near sea level. I would avoid soft rock caves and instead try to find very hard rock and mountains that contain massive solid slabs of rock vs. layers of different elements that could easily shatter on impact from asteroids. Some may consider this graffiti however explorers in the distant future may find it interesting. Just like parity data I would repeat my carvings in many caves as some will be destroyed. I would then make videos and pictures of my etchings and upload them to the websites and archives that may be around for a couple decades. This is probably just me, but I would never pay a site to keep something around. Businesses fold every day that were pinky-promised to be around for lifetimes.
Either that or write something really good, so people want to read it, so they will keep paying for it to be published over and over again.
I think the first option is actually a lot easier.
If you are 25 today (2024) you might have adult children in 25 years time; adult grandchildren in another 25 years and great grandchildren 10 years after that (in 2084).
The internet, URL's and websites will be very different by then. Think about the world 60 years ago (1964). This was around the time that 7400 series TTL integrated circuits were released.
How much of your early digital history are still readable today? You might have a box full of 3.5 inch floppy discs but can you still read them.
In short, unless you have a string family history of digital archivists I would only trust paper.
https://www.familysearch.org/memories/
It's a service provided by the Church of Jesus Christ of Latter Day Saints (of which I'm a member), which considers preserving family history to be a core tenant. To the point of storing family history records in the Granite Mountain Vault (https://en.wikipedia.org/wiki/Granite_Mountain_(Salt_Lake_Co...)
For example https://www.verbatim.com/subcat/optical-media/cd/archival-gr...
A great site explaining the differences in discs is https://www.canada.ca/en/conservation-institute/services/con...
How about just putting the things onto a USB disk, or several of them, for redundancy purposes? One hopes JPEG and PDF (or HTML) will be around for another 100 years. No guarantees for USB though, the USB standard might be USB 3.2 Gen 17x69 Rev 42 Type Q in a few years.
If you can throw enough money at the problem and are in the US, set up a trust to host your content for as long as the funds last.
If not you could bet on The Internet Archive to outlive you (and maybe donate to them).
But I think the bigger issue than hosting is discoverability. How will your great grandchildren find your content even if it was still available?
To cover both issues the best bet is to focus on somehow convincing your offspring on keeping your content and memory alive in what ever way they see fit, enough so that they pass it on. I have no ideas for exact details here, maybe someone else does?