For everyone stuck at home: I made a solo adventure for 1st level, playable in-browser! The adventure, The Saint's Tomb, (https://sayeth.itch.io/the-saints-tomb) is a gamebook-style adventure, meaning that you make a character sheet, roll your own dice (though 2 of each are supplied in-browser), keep up with your inventory, spells, and HP, and are on your honor to be honest.
It's all text-based with some public domain illustrations, and you click on options as you make decisions and roll the dice. I didn't format the game for phones, but it should be playable on all browsers. I wrote it to help new players learn the game, but it should be fun for experienced players too.
The Saint's Tomb is free, though you can leave a tip for me if you're able by clicking "Support this Game".