I guess I'm going to have to ask the Gods to make sure I was sent here without any diseases.
Actually is there a quick way to check if I brought over any diseases? At least one that is faster than waiting to see if everyone here dies?
If you have no symptoms, you're probably fine. Even though our diseases could definitely kill these people, you have to be contagious right now for it to matter. How much time did you spend alone here, from your perspective? If it's been much more than a week, you are successfully quarantined against most of the things you could be carrying without knowing it.
So uh...how do I make bread?
You don't.
That shouldn't even be in your field of view right now. That is centuries away. Sorry.
I'm entirely willing to try industrializing these guys. And anyone else. That is kinda my long-term goal right now!
What is their technology level from what you've seen so far?
So the thing is that language is surprisingly easy to learn under these conditions. We can see many examples of successful first contact between peoples in history where somehow they managed to communicate despite having no language in common. First, facial expressions and nonverbal vocalizations are virtually human universals, meaning they are the same for everyone. Gestures based on concrete activities often are too. Even some abstract gestures are - despite the "your finger you fool" legend, almost everyone understands pointing, at least if you do it often enough. You can enhance the impression of indicating some thing by making eye contact and then clearly looking at the thing, too - it is natural to follow your eye movement to see what you are looking at. If you speak a verb while performing or imitating the action, or a noun while indicating the object, you should be able to get people to get an understanding of what you call some things. Once you've started, try to make an expectant face and your interlocutors may get the idea that you want them to tell you what THEY call things too. Adopting their vocabulary will make your life easier, but don't be afraid to use it to express complex sentences using English grammar - some linguists, viewing the incredible success of the English language at conquering the world, have theorised that something about it might actually be advantageous, so it's
conceivable that teaching them English grammar will give them a long-term advantage. Plus, it'd be really funny.
Most of the process of learning a language seems to be unconscious, but as some advice, look out for patterns. If two similar things get two different names, but those names share a part, that part probably refers to what makes them similar. This is also a good way to teach and learn adjectives: find things that have that adjective in common but are as diverse otherwise as possible (to limit the number of ways it could be misunderstood), say your own word for the adjective, and then make an expectant face.
It will probably take a long time before you are capable of communicating with them in all but the most basic ways, though. Don't be discouraged: once you can express basic subject-predicate constructions, this will already be a great help to your survival.