Welcome to The Router Forums and 'the craft'. In a lot of ways you are miles ahead of so many people who decided to get into routing because you have a clearly defined objective, making frames for paintings!
So many of us router enthusiasts, myself in particular, try to focus on far too many different things the machines are capable of doing, and that has a way of being very confusing.
If possible, when you go to the store, it would be helpful if you could bring along contoured samples of the types of 'frame stock' you want to cut with your router.
The process of comparing a prospective bit directly to a piece of wood allready cut into a profile you like simply by holding them side by side can not be equaled for speed, efficiency and accuracy.
I have done a lot of 'practice' routing on the cheapest woods I can find to keep the cost of learning from mistakes down as low as I can. Since the nicer woods are usually 'hardwoods' practicing with construction lumber isn't entirely like working with the real thing, but it only costs 5 to 10% as much, and in a lot of cases, practice projects turn out just as usable (in my case I make more boxes than anything else).
Good luck on your shopping trip!
wbh1963 is flowing with the grain in Arlington, Washington, USA
A day without curls is like a day without sunshine!