Any advice on how I can improve my Speedo bulge?

[Mrblankface]

I’m concerned it’s looking a little bit small

 

[Jon1971]

Cock ring

 

[JTNZ]

Yep, definitely a ring, one that goes Around balls and cock. It lifts balls, pushing them forward, and makes everything stick out way more.
Also, those briefs are flattening you. Get something with a real pouch shape. Search aliexpress.com for "sexy U-convex pouch" and you'll see exactly what I mean!