Genshin Impact heavily focuses on farming different in-game materials, and it's no wonder even I feel burnout sometimes. I'll recommend you farm in co-op mode; that way, you can farm faster and get help from your friends. Most of the time, even if none of my friends are online, I join strangers' worlds and ask their permission to farm. Some of them are nice and even help me with the farming materials I require for my characters. So, your best bet to farm is to co-op, and you may find someone who'll be your future partner in events!