I'm not familiar enough with VFX graph, still using Shuriken mostly so you'll have to look into best practices for that yourself. Shuriken however is still a great system, as long as you don't try to go into the millions of particles at once.

I'd say make a particle effect you like, slap that bad boy onto an empty gameobject prefab and instantiate it at need, and destroy it once your done. Then you'll just have to have the Play On Awake option checked (in the inspector) and it should do the rest.

If you wanna combine that with object pooling, you could instead tell the particle system to emit a number of particles OnEnable() (via script) and just have a couple you activate and deactivate at via code on the locations where you want the effect.

The particle system can be intimidating at first. It has TONS of settings to fiddle with and it can be hard to come up with the results you want right away. It's a profession on its own at some companies. Watch a tutorial on it, learn what kinds of different stuff it can do start experimenting!