(These are from my experiences, if you disagree with them, please say why, instead of saying I'm wrong without explanation)
To a degree, you can use magic as a boost for certain situations. Luck spells for example, often work in this way as an instantaneous reaction.
Rain spells usually take a longer (over the course of a day or more), but I have made rain where there was not a cloud in the sky before, as have others.
Enchantments are best if accumulated over time with dedication, but they as well work instantly.
If you want to show your friend the reality of magic, you can do energy transference, which you can do by putting your positive energy into their body through touch.