pfft. Spit out WINE? Are you crazy? I know sommeliers have to do it, and it's part of the ritual; particularly in a tasting where there is a lot to taste (you want your mental acuity sharp from the first pour to the last, after all), but I have been to quite a few tastings and have never spit out or poured out wine, ever. Well, once, I think, when I didn't like the wine, but linnea, you can be an accomplished taster without having to do all the snooty gymnastics. Here's the test: when you put something in your mouth, can you decide within a few seconds whether you like it or not? If so, then you can taste wine.
All that stuff about picking out floral notes and yaddah yaddah simply comes with time and experience, which fortunately means you get to go to lots of tastings and drink lots of wine while you develop that experience. And leave the spitting out and the snob yoga to the professionals. Pour, swirl, sniff, drink. Drink some more. Keep drinking. Taste lots. Have fun with your new hobby. Choose a designated driver. Book a hotel within walking distance of the vineyard. Laugh much.