I love games of all types, but the game I’m constantly playing on my phone is Spider Solitaire. One-suit play is pretty relaxing. If you want to up the challenge, just increase the number of suits.
I will 2nd Spider Solitaire. It’s likely already on your computer so no download necessary. It’s very addicting.
Play 2 suites
1 Suit is too easy, 4 Suits is impossible
2 suits is hard enough, maybe if you are a natural you will win 10% of the time, but as a beginner expect maybe 5%
Minesweeper is always fun to, but you have to have a good mouse.