Hi Steve,
Welcome
That is a good size scope you have and you will be able to see plenty of good stuff (technical term) with it.
Just to reiterate what Malcolm and Brent have said ... no matter how big your scope, Stars will always be just one pixel of light, and therefore not any bigger to view.
What we do look at though are Globular Clusters and Open Clusters of Stars, Gas Nebulae, and galaxies. For almost all of these the eps you have are the right size, as these are big objects and you want to fit as much into your ep as possible. (Maybe compliment with a 20 and/or a 15mm is a good idea too as Brent suggested)
What you will use the higher magnification eps (like 9mm or less) will be planets where you want to see up close the detail in Saturn's rings and Jupiters bands, GRS, and moon transits, and our own moon (best viewed in crescent).
So the biggest thing to help you enjoy the DSO's (deep space objects) is how to find them.
A planisphere can be a big help, especially when used in conjunction with Stellarium.
Try and find an observing group near you so you can borrow and see various eyepieces (in your scope), and other advice on how and what to look for,