Pure rosemary oil does have a very strong aroma to it, which I have personally smelled myself so I certainly know what you are talking about. Here's a list of other suitable oils that are highly moisturizing that you could use instead that actually won't hurt your nose: sweet almond oil & coconut oil. I also second you trying jojoba oil as well. You can just apply it to your scalp, by taking a little bowl and pouring at least 3 drops into it. And then apply the oil to your scalp section by section. Now, what ever is left in the bowl after you have finished doing your scalp is what you would apply to the ends of your hair, if your ends are dry too. You can definitely adjust the amount of drops of oil that you use, depending on your hair's thickness.
Hope this helps you out, Curlycaroline!
Products in my current regime: Nioxin Scalp Therapy Shampoo, ORS Replenishing Pak, Curls Whipped Cream, Curls Souffle, Curls Spiral Curls Cream, Curls Milkshake, Curls Quenched, BB(Bonner Brothers) Growth Lotion