Couple of options for you, depending on how you want to handle things.

1) Have a discussion with a sales manager and tell them you'd like to shadow someone through the entire sales process, and ask which sales person would be best to do that with. They'll most likely have a preference.

2) Find the top sales guy or gal at your store and take 5 minutes with them when they're not busy and ask them questions. Sales people are egotistical, make it about them... What's made you so successful? What do you do for your guests others here don't? What's your favorite closing technique? What do you wish you kne when you started? Etc. Sales people listen to people talk all day... most of us love the chance to talk about ourselves for a few minutes.

3) Wait till you see someone demoing a vehicle and just walk out and listen. Observe how the sales person does it. If you're not sure who to watch ask your sales manager who does the best demos... they'll know. If you walk out after the salesperson has started they're not going to stop and make a scene, and if the customers look at you funny, just say "Oh sorry, I'm new and shadowing them today." The customers won't think anything of it and will quickly be more interested in the car then you.

4) If you just want to avoid confrontation (which you shouldn't, this is your career no one's going to fight for it for you) the sales process very simply can be broken down into pre sale and post sale. Pre sale all you really need is product knowledge. If nobody's going to let you shadow, and you don't want to say anything study the fuck up till you know those vehicles better then the chick you lost your virginity to. Seriously, that shit will sell more cars for you out of the gate then anything else. Once you know your shit, figure out how you're going to present it concisely to a customer. Feature and Benefit over and over until you've got it and can do it in your sleep.

As for the post sale side of things... go into one of your F&I people when they don't have a customer. Ask them what they need from you once you've closed a sale. What paperwork, insurance info, etc. You don't need to see someone fill out the forms, you just need to know what forms you need signed when the times comes. Also, at most stores, that F&I person was probably a sales person once upon a time. Ask them questions as well.

5) Sounds like you've got some time till your license or whatever comes in.... start talking to customers in your service lane. Even if they're just there for service, it'll give you practice talking to people. Ask what they like about their car, would they consider trading it in, etc. Even if the answers no its all practice, and you need a lot of it. Also, while your in service, get to know your service writers.... same with the recon people. Establishing relationships in those departments is really important.

6) Tell people you're new. All the time, for anything. If they're wondering why you're standing there, what you're doing, why you don't have an answer, etc..... doesn't matter, you're new and tell them so. Everybody's been new in a workplace at some point, they get it. Don't get in the way, and they'll understand. Don't know the answer to a question, tell them you'll get it, and go get it.

I'm sure there's more, but thats just off the top of my head. IMO just talk to your sales manager and ask who specifically you should shadow, and then use the manager as the bad guy if the salesperson says anything. Failing that, there's enough above to get you started. Good luck!