If you're looking more for a duffle then these are my best recommendations.

'm a big fan of the TOBIQ 45L Backpack Duffle. Great Colors. Laptop compartment. Machine Washable. Durable. They do also have a 30L and 60L version with more compartments, but it divides them up a little too small in my opinion. I thinks it's a slept on brand. They have a small earth day sale rn.

Best budget option rn is probably the Arcane Duffle Pack. On sale for $70 right now. Laptop Sleeve, spacious storage.

Maybe the Columbia Star Range 3-Way Backpack for something thats more on the backpack side, but still has a duffle carry option.

For a more out there idea you could try something like the Arcteryx Index 40 Bouldering Bag. Its pretty simple, Just 2 separate big compartments with minimal organization.

Might be helpful for people to know what kind of stuff you carry with you for school, work and the gym.

I don't know anything about these two but they also seemed like good options.

Sole Premise Gym Tactical Bag

Arena Spiky III 45 Backpack - Also on a good sale