Thanks for sharing, that was interesting. I attended my first conference a couple weeks ago at UCLA, and I wish that I could have just observed, but of course you don't get flown out to those things to simply watch. My presentation was an absolute train wreck. Voice audibly wavering in pitch, I kept walking off from the microphone to get a better view of the screen, laser pointer dot amplifying the tremors of my hands. First time I'd spoken into a mic since a birthday party in 2nd grade, I think. Finished my 15 minute presentation in about 8 minutes, and no one dared asked this poor grad student any questions, likely out of pity. Sigh
Being your first, it was probably bad, but probably not as bad as you think it was. The thing is, most people forget everything they saw in a talk by the time the next one is finished. They might, however, remember your face, name or topic, and that's the best you can hope for. Next time you submit a funding application, you hope that one of the reviewers has heard of you. The more talks you give, the more likely it is. You'll get better at it.