Hi,
It looks prety good for your first time. Nice snowless patch!
The pole looks pretty stiff and straight, so that's good. They are quite stiff.
I can see a bit of ripple in the fabric near the front apex- so try a bit tighter on corner and ridgeline tieouts. It's OK to pull hard. That is proabably the main point you are looking to improve- the overall tightness. That's mainly a point of how tight you pull out the guylines.
Try using very minimal tension on the mid side perimeter tieouts. The ridge and corners really set the shape and create most of the tightness. The mid sides and center panel tiesouts are often not needed except for big wind. They should be staked out last and be only slightly snug and eady to take any added stress on the tarp in a gust. You may want to use a small loop of 1/8" bungee on the side panel tieouts.
On Stakes: Angle them about 30% toward the tarp and shove them in all the way tight. If you start with the guyline state end loop on the ground it won't shorten the inch as the stake is shoved in.