There are cca 1 000 Pywikibot bugs and tasks to do, it would be great for a hackaton, but it's too much of them. I can prepare some project if there will be much interest. One project is already in plan: T186208 will be a challenge for me (as integration team is too busy to help).
Anyway I would rather offer a training/skillsharing/workshop - @Dvorapa's personal help and knowledge. From basics/essentials to hard/deep-coded stuff. A look into the opportunities of the library; from using the scripts, through writing own scripts, up to the development. I can mentor patches for bugs driving you crazy.
Finally the meetup group is still growing to talk about any wonders coming to our minds, Pywikibot future and cooperations (T222608), issues and development, possibly some games (I have one: who can reach bug Traceback most quickly? :D I can do in 6 seconds with cfd.py, who can beat me? :D )