How to use BNO055 API's

I am fairly new to coding and so I've been looking at the provided API's from github but I am confused as to which ones I actually need since there are a lot of functions. I only need to read linear acceleration and absolute orientation but there are a lot of API's that are listed which is why I am not sure which ones I will need. If it helps, I am using this over I2C and I am using PSoC 4