Great advice! I'll also add that, when conferences ask for abstracts, don't fret if your findings or discussion vary a bit from your original abstract. At the conferences I've been to, they don't print the abstracts in the program. Instead, they print the title of your presentation. So, if your findings or discussion vary a bit from the original abstract, as long as they are in line with the topic, you should be ok.
Granted, this may vary depending on the conference! I've only presented at two conferences so far, and they were very different from each other!
My first presentation was at a round-table session with four other people. We all ate breakfast together, and it felt like I was talking with old friends! It was a smaller conference, and everyone was so incredibly warm and welcoming. I gave everyone at my table a handout to follow through my presentation.
My second presentation was at a bigger regional conference! I presented during an early morning session with three others to an audience of about 15 people. I used a PowerPoint presentation to provide some examples from my data set (longer quotes from newspaper articles), and I provided handouts to the audience members so they could follow along and didn't have to take as many notes. It was definitely more formal in that I was standing before an audience rather than sitting in a circle with a few others, but it was just as much fun!
One thing to remember at conferences: presentations are so much more fun at conferences because you're presenting on YOUR OWN research that you've spent (hundreds of) hours with already! That added a layer of familiarity and comfort to the presentation that I never felt during undergrad presentations =)
PS - I see you were a philosophy major in undergrad, too!! hooray!