Glove skins are totally worth it if you can afford them! They're one of the most noticeable cosmetics since you see your hands constantly while playing. The price range varies a lot - you can find decent pairs for around $20-50 or spend hundreds on rare patterns. What helped me choose the right gloves was learning about different wear conditions and float values at
https://dmarket.com/cs2-wiki/gloves/ which explains all the glove types and their market values. Start with cheaper glove skins to see if you like having them, then you can always upgrade later. They hold their value pretty well compared to some weapon skins too