You want to give her more high fat, high protein foods instead of sweet foods like fruit (which nutritionally is more of a simple sugar and water). Besides, if you just give her fruit now, you'll be banging your head against the wall in 3-5 months when that is all she is willing to eat.. So no is the time to gear her taste buds to accept non-sweet foods also.
When my daughter was 6-10 months old, I gave her microwaved egg yolk with shredded cheese (assuming of course you don't have any egg allergies in your family history; if you have food allergies, then you should avoid giving her eggs until after 1 yr old): Separate out the yolk from the egg white (because the egg white is the portion of the egg that tends to cause allergic reactions in small children); mix the yolk with a splash of formula; microwave for 10-15 seconds, mix it up (does it look cooked?); add a little shredded cheese, mix... you can spoon feed it to her once it is cool. (When my daughter was a bit older, I would roll little balls of the "cheesy yolks". She thought the balls were fun finger food.
Yo Baby yogurt is good. Available at most grocery stores. I have several good friends whose kids love mushed avocado (I could never get my daughter to eat it).
By the way, I mixed breast milk and formula in my daughter's bottles, in additional to straight nursing... To me, that was a good way for her to get both my antibodies and the formula's necessary fat & calories (my diet just wasn't that good/complete when I was breastfeeding; it takes time and effort to eat right...). Some babies don't like the grittiness of powdered formula, especially if they are used to only breast feeding. I mixed breast milk with the pre-made formula. However pre-made is darn expensive... So, you start on the cheap powdered formula (get a small size) and if she doesn't like it, you might have to switch to the pre-made kind.
Just look for signs of a milk allergy (congestion or eczema, mucus diapers, etc.) You might have to rethink her diet if you see any signs of milk problems.