Don't worry about it. It will all come with practice, practice, and more practice. Just start slow and do it correctly. Don't get sloppy. It will get easier and your speed will increase.

I hope your instructor teaches you theory along with the guitar. It will be easier for you if you start with theory now as to tiring to learn it later.

Just curious, how old are you? I started at 13, I'm now looking at retirement.

Good lucky and stick to it!