When determining your character’s ability scores, increase one score by 2 and increase a different score by 1, or increase three different scores by 1. You can't raise any of your scores above 20.

You are a Monstrosity

Your character can speak, read, and write Common and one other language that you and your DM agree is appropriate for the character. The Player’s Handbook offers a list of languages to choose from. The DM is free to modify that list for a campaign.

Due to your spider legs, you can now walk on walls just like the spell "spiderwalk", while not wearing heavy Armor you can walk on vertical and horizontal surfaces, also not affected by a webs difficult terrain

You can pull silk from your abdomen, in order to create silk you need to eat gold coins or other currency  equivalent to the silk created (10gp for a 3ft/yard). at level 3 you gain the web spell and can cast it free once per long rest

120 ft of darkvision

You count as one size larger when determining your carrying capacity and the weight you can push or drag