Hey StarFruit. It has been awhile. Since I do not know what your set-up is I am not sure what you find uncomfortable about doing the dacus.
Just assuming normal default controls for the GC controller.
1) If you dash from standing, then press A within the next 5 frames will cause an Fsmash. C-stick down will prevent this from ever happening, so you can dash + c-stick down right away and go into a dash attack.
2) If you use the grab button for your usmash input, then you might boost grab if you press grab too soon after doing the dash attack. To prevent that mistake from ever occurring, it would be better to use an attack button for the Usmash input.
3) Some time might be wasted during a rotation of the control stick from dash to the Usmash input. This can fixed by having tap jump off. With tap jump off, you can now dash forward by pushing the control stick in a diagonal-up direction. Not only does this act as a dash, but when you press the A button the game will register the control stick as up and an Usmash will come out.
Now that I am done explaining what stuff can happen, I'll just summarize some changes which should reduce errors when doing the dacus.
tl;dr Do c-stick down for your dash attack. Have tap jump off and dash/maintain your running by pushing the control stick into the up-left or up-right diagonal on the control stick. Assign one of the shoulder buttons (Z/L/R) to attack, and use this button for the Usmash.
Also a really good set-up for getting Sheik's Dacus 100% of the time.