Way to go , Conrad! Congratulations!
Definitely not your brush's fault. Just about any brush made is capable of creating a good lather. It's common for newbies to drastically underestimate the amount of soap or cream necessary for a good bowl of lather. Use a moist brush (not dripping wet), a lot more soap, and gradually add water, a drop or two at a time while you whisk up the suds. Once you hit that sweet spot of the proper soap/water ratio, you should be rewarded with a nice bowl of thick, rich, slick lather.
Take some time and practice building lathers when you're not shaving. Soap is cheap...just keep working at it until it becomes second nature.
That being said a good brush could probably help a newb like me get better results
I've read about Tweezerman Badgers and Omega Pro 49's, Semogue 1305's and even the Bestshave Horse Hair no.6. But I just need to ask, what is the best affordable (say less than $30) brush to build lather with using a bowl? I don't mind if it isn't the smoothest brush there is (I'd imagine it can only get better from what I have, and I don't have any complaints on comfort on the one I have), but the emphasis is on ease of lathering in a bowl.