Welcome to the forum.
I think you're a bit overwhelmed and nervous because you have family in the US who will probably not support your decisions/conversion. You may also feel like changes are happening quickly. I want you to know that these are completely normal feelings. You should also not feel pressurized to convert or change unless you want to by your own free will. Your host family probably feels obligated to teach you the correct Islam which may make you feel like too much is happening at once, however it is good that they are not sugar coating anything because this is the reality of what is expected of you eventually as a servant of Allah. It is good to start practicing the easy things as soon as you can, but you can also start as you start to understand why they are important and their significance in Islam so that you can actually love and see their benefit instead of feeling like they are a chore or a rule. It's great that you have people who are willing to support and guide you the correct way, but let them know if you don't understand something or need to take things step by step first. Not everything has to happen in one day. If in your heart and mind you truly feel you belong in Islam, then you should convert because your heart already believes in it anyway, you just have to say it out loud. Afterwards, you can implement other things such as wearing hijaab, prayers, fasting, etc.