>>712535871
>How long should a project take or how long should i plan for one?
It really depends, especially because as your skills start to develop, you'll be able to do things more quickly.
When I first started, it took me a little over two weeks to make a super basic game (you walk around as a duck collecting eggs) from start to finish. So, menus, moving, end screen, etc.
Now something like that would take me a day or two.

This is meme advice, but there is some merit to it. Start with small-scale projects.
Where the advice falls short is that most people think that implies re-inventing the wheel for each new small project. Don't do that, build off of the last one. This way, you'll slowly build a library of game mechanics and ideas that you can pull from later down the road.

So yeah, that probably doesn't really answer your question, but it's hard to determine how long something will take. Even if you have a good idea, you'll probably be wrong (speaking from experience)
My only advice is to build a library of helper functions/methods as you work on stuff. This helps a ton for future projects. My current game project (I've shared it here a few times, not gonna bother today cus duck picture), uses about 75% of that helper library I made.
This project is around 6 months into development, and I've done more in that 6 months than I've done in the previous 4 years.