I know ripper93 (who makes awesome Foundry modules) has recently made a free online tool for converting images to webp. It’s original intent is probably so people can use it for Foundry, because Foundry and webp are great together, but it might be a nice option to direct people to that for file conversion: https://webp.theripper93.com/

In case you want to play D&D 5E but without supporting WotC while also having more customisation options: Check out Level Up: Advanced 5th Edition. It’s also got its own thing for inspiration: during character creation, you pick – other than heritage, background, and culture – a destiny. It’s what your character is meant to do, their story, their goals. This destiny gives you another means of gaining inspiration (things tied to your destiny) and a unique way to spend inspiration. (Also, you gain a special destiny feat when you accomplish a big thing related to your destiny!)