It's difficult to go wrong experimenting so long as you are using more or less conventional materials and proportions. That is to say, with your grain bill, don't do radical things. Base it on two row, keep crystal in decent proportions.... under 10%. Play with Munich and Vienna, try biscuit malts like Victory as a percentage. USE GOOGLE, and read about the malts you are wanting to try.
There is a beer balance chart out there that tells you what IBUs at what original gravity give what result.... It will accurately tell you weather your beer will be malty or hoppy, and how malty or hoppy.
Read about the hops and what their characteristics are, and look at the recipes section and read comments.
I use Brewer's Friend, which I find far more congenial for my type of brewing than Brew Smith.......but to each his own. BS seems to be more popular than BF with it's more Applesque system. I don't brew to a "style" normally. I brew what interests me. I play with hops all the time, and find combinations I really like, and some I don't really care for, but not "dumpers". Out of 58 brews in a little less than 13 months, I've had two "dumpers", one was a sour that I simply didn't like, and the other was something I shouldn't have tried anyway. I don't normally do recipes.
You can't go far wrong with the "noble" hops and their derivatives.. Google them. If you like a particular brew, read up on it, and look for clone recipes. I don't want to "clone" anything, but I do want to look for what lends a character I like. For example one of my all time favorites was an ale called Drifter by Widmer Brewing. The hop that lent it the character I loved so much was Nelson Sauvin, which I use extensively in various combinations, and is the backbone of many of my brews. Do you like citrus flavors, or stone fruit, do you like a spiciness or and earthy or evergreen or floral flavor or aroma?
Read, read, read..... and read some more. And play. I often buy a hop on a whim, then try to figure out where and how to work it into my brewing. Brewing should be an adventure, a journey of discovery. Your beers do not have to fit a "style", nor do they have to be blue ribbon winners. It's more important to learn than to "win".
H.W.