Absolutely possible to do it alone, yeah! My biggest piece of advice is to make something that you think you'd be able to do the "core" of in 1/10th the time you've got to spend working on the game. That way, you can get a feel for what's fun about your game, and spend the rest of the time making content and polishing it!

For doing it without giving up, that's just practice I'm afraid. Don't be scared of getting things wrong - you're going to do things wrong all the time 😂 don't stress about it, this is just a fun little event. Join the Discord server and post your progress, you'll get some nice feedback from everyone there - it's a lovely little community, everyone is super friendly 😁