Without the engine running you should be able to press your shifter down gently while rolling the bike a few inches forward and or backward to downshift one gear at a time until you're in first gear. Then with the same little roll forward and or backward you can shift up into neutral where the bike will 'free wheel' so to speak, then you can shift up to 2nd and so on. It's different with the engine running, and you'll need to have the clutch disengaged, clutch lever pulled in, to shift but the roll forward/backward will not be needed, and it may CLUNK loudly into gear. Don't let that weird you out.
Hope this helps. Take lots of photos and videos, write down notes on paper.
You'll want to remember these times later on down the road. Oh, and find a place to download a copy of the Factory Service Manual, private message me if you need to know where.
You're only new to this once so enjoy the excitement.