Can you think of any small things I can do to thank Thor? He helped me out just when I needed it the most, but I am very new to all of this. I don’t really know much about altars and offerings and such.

systlin:

No worries! Thor is one of the most absolutely enthusiastic gods about any sort of thanks. He love humans, and loves it when you interact with him. 

Make a nice meal in his honor, and invite him to share it with you! Light a candle, and tell him, aloud, how grateful you are. Do something good in his honor! All of these would be excellent ways of offering him thanks.