That’s a good pairing to start off with and very well suited to your age. 
All I’d suggest you might also want to consider is some Instant Shine in there but it can wait.
Yes, one spray is the best way to start - Follow the Sweet Spot Guide in here:
Ideally you will do this for both one at a time but I suppose you are raring to mix them and yes you can, no problem!
The only thing is that you don’t mix the pheros, you layer them. Just spray the first, then leave it a minute or two for the alcohol to evaporate and spray the next layer and repeat to add something else or a cover scent. The only thing to avoid is spraying over an oil base phero as that can wreck its diffusion, use dofferent app points here.