The process of it can totally be self care. I used to love the Pumpkin Sleeping Pack too. A sleeping pack/mask can be great, particularly one that feels substantial on. Products with great sensorial aspects can be lovely to use.
Like others have said, if your skin is fine and happy keep things simple. Don't worry about getting a routine going, if doing nothing worked for my skin I would totally do that!
That said, if you liked the sheet mask, it was probably having a little more hydration that made things feel good. In that case you could add a simple moisturiser, maybe for night time so you can wake up extra moist, which does feel nice.
I put on a lot of moisturiser, because I am the desert without it. I use AHAs etc, but when self-care is a struggle for me I will just put some German Nivea cream or Illiyoon Ceramide Cream on and call it a day.
These are all great.
- A website that I found primarily for its watercolour pigments section, but which goes off in other directions is http://www.handprint.com/
- On the same theme is https://www.artiscreation.com/ which is a pigment database.
- Finally categorising pigments by when they were used in history is https://colourlex.com/