I think you're doing great. If the machine gives you a good stitch and no trouble, you can do just about anything. Just look at everyone who loves to stitch on the "oldies but goodies" like the Featherweights and such. It's all about knowing your machine's capabilities and the level of your experience. And experience just comes with the hours and projects you put into it. Just go for it :D
ETA: I recieved my first machine, a Singer with a zig-zag stitch, when I was 12 years old for Christmas. That was 40 years ago. It never kept me from sewing anything! I handed it down to my niece last year and she has been sewing up a storm ever since. I hope you aren't intimidated by all the bells and whistles available today. Those features are certainly lovely, and I do appreciate them now, but 90% of the time, all you need is nice straight stitch.