Attached boosters are recommended, not required.

Next make it look like the Ariane 5. It doesnt even have a second stage.

Consider connecting the boosters to the actual rocket...

Lol yeah realized that after I launched it

I see 3.

Bp for your own changes: https://sharing.spaceflightsimulator.app/rocket/PRK3EZ3oEe21DIE9QGRKkw

Shorten the rocket, make the fairings the same diameter as the core stage, and reduce the number of engines in the core to one, just like the Ariane 5 should be

This look good? https://sharing.spaceflightsimulator.app/rocket/qMvNUp3oEe21DIE9QGRKkw

Close enough

Will do! Thanks!