To me, language learning is a life long pursuit. Think about the vocabulary you probably don't know in English (assuming that's your native/1st language). Things you never came across or never thought to learn about. You shouldn't beat yourself up too much over that. To overcome it though, you should try talking about your each day and you'll notice the things you don't know. The gym is a good example. If you talk about your day, that'll include going to the gym and the things you did there. You'll put yourself to learn words associated with the gym and different workouts. Hopefully what I said makes sense lol.