Very good 👏👏 content. Maybe in the future you can explain the reflexive possessive pronoun "севой" which all my Soviet-era Russian language manuals considered self-evident and only advised to decline as "мой". But it is not so easy or obvious. I decline it like this: Masculine/neutral Nominative - севой/севоё Genitive - севоего Dative - севоему Accusative - N. or G./севоё Instrumental - севоим Prepositional - о севоём Female: Nominative - севоя Genitive - севоей Dative - севоей Accusative - севою Instrumental - севоей Prepositional - о севоей Plural: Nominative - севои Genitive - севоих Dative - севоим Accusative - N. or G. Instrumental - севоими Prepositional - о севоих Unfortunately I don't know if they are correct. 🤔