I wear tight socks I got off of Amazon: https://www.amazon.com/Mondor-Light-Opaque-Skating-Junior/dp/B018Y07SA2/ref=sr_1_3?ie=UTF8&qid=1547505137&sr=8-3&keywords=skating+socks and I wear black Walmart jeggings to practice. They are stretchy, moderate thickness, and cheap ($12). They tend to last around 4-6 months, pretty well considering how often I use them. AND they are stretchy enough to go over the top of my boots.
I pull the top of the sock down over first to keep my tied laces from being a problem and then pull the leggings over.