LEGO Star Wars: The Skywalker Saga

The resources you need for this will come naturally as you complete the story episodes, but if you are low on bricks i find travelling into the space of regions and going after khyber comets which give 5 at a time(but only spawn once)

As the other guide says focus on one class for this achievement, doesn't matter which(but don't upgrade the core class).

Once you upgrade it to 100% this will unlock the achievement.

You need 96 khyber bricks and 340,000 studs to fully unlock the jedi class

This seems to only be popping when you upgrade the Jedi class all of the way - at least that is the class the other guides here reference and the only way it would pop for me.

I had fully upgraded Scavenger, Bounty Hunter and Dark Side before Jedi and I didn't get the achievement until I completed Jedi.

Could be a coincidence or just a poorly written description of the achievement. Achievements are pretty unpredictable for this game.

For this achievement you can just focus on one character type and upgrade them all the way. It will cost bricks and studs to unlock the character bonus in each section.

I recommend focusing on Jedi first. You use them the most through the main game.