You can follow the submissions via an RSS feed.

For example, if you use the link Https://lemm.ee/feeds/u/Corr.xml?sort=New, all your previous posts will be displayed.

Instead of lemm.ee you need to specify the instance where the user in question is registered. And instead of Corr you have to enter the username. For example https://discuss.tchncs.de/feeds/u/fryboyter.xml?sort=New. That would be in this case my contributions.

There is no such thing as the objectively best solution. Each tool has advantages and disadvantages. And every user has different preferences and requirements.

Personally, I am using Borg for years. And I have had to restore data several times, which has worked every time.

In addition to Borg, you can also look at Borgmatic. This wrapper extends the functionality and makes some things easier.

And if you want to use a graphical user interface, you can have a look at Vorta or Pika.