Yogurt Help

Hi Everyone,

I only enjoy three types of yogurt: Coffee, lemon and Fage Greek yogurt with peach preserves.

Each carton costs anywhere from 59¢ to $1.09 depending where I go and if there’s a sale. It only provides one serving.

I could purchase a tub of plain yogurt for about $3 and probably get about 6-8 servings.
For a few more dollars, I could also buy what I need to recreate the three flavors I enjoy.

This is where I need help. How do I recreate the flavors?

For the peach preserves, I was thinking of purchased tinned peaches and pulverizing the peaches to add into my yogurt. Or frozen peaches ( if it’s cheaper) with some sweetener.

But how do I recreate coffee and lemon?
Instant coffee? Cold espresso? Lemon extract? Lemon juice? What ratio?

TIA!