Hi,
I would definitely advise anyone to take part in game jams, I’ve been doing lots of them since 2018 and I always had a great time and made cool projects (okay, maybe not that cool, but at least I enjoyed making them
).
Now, to answer your questions:
Which game jam would you recommend?
In 3 weeks starts the GMTK game jam (GMTK Game Jam 2025 - itch.io). It lasts 4 days, which is 2 more days than the typical weekend game jam, which is very cool for people who doesn’t have a full weekend to spend on the project. Also, the GMTK themes are, imo, very interesting and fit the game jam mood perfectly, as they always tend to find short and fun game ideas.
I’m not doing as much jams as I did a few years ago, but I still (almost) never miss the GMTK as I believe it’s one of the best out there.
I suppose you already know about the Ludum Dare (https://ldjam.com), which is one of the biggest jams. There are multiple ways of participating, you can either submit a game made completely alone in 48 hours, a game made with a team in 72 hours, or take a few weeks to finish the game, which will not allow you to enter the leaderboard, but that doesn’t seem like something you’re looking forward to anyway.
You can share your progress on the website, react to other people games, ask for help, etc. Since there are lots of developers doing it, the jam is very active.
And, as @qaqelol said and I couldn’t agree more, there are tons of jams on itch (Game jams - itch.io) so you can find that you think is cool and go for it!
Also, working fulltime, having limited time to work on a project (circa 1h per day) is it even worth considering it (it is one of my main roadblock)?
Time is indeed a precious resource when it comes to game jams, but if you are okay with the idea of working only a few hours in total on your game, then it’s worth considering it. One could even argue that, if you eventually don’t like the jam or the game you’ve made, at least you won’t have spend too much time on it.
Also, game jams are a great way of testing some new game ideas, new game engines, etc. so maybe you’ll build something small, but that you will keep working on afterward, who knows?