1) if you look up NNN skate binding on Amazon there are a number of options. It would likely be beneficial to get skate bindings as opposed to classic bindings. They are pretty similar, but the skate bindings will be a bit stiffer which is better for skating. For example, https://www.amazon.com/dp/B07G1C5VLH/ref=cm_sw_r_cp_api_glc_fabc_kAS4Fb6ZDR3CA

2) You should be able to slide the bindings on yourself, I’m sure there’s a walk through of how to do that online. The main thing is to set the back part of the binding to fit your boot size.