There are (slightly sketchy) websites that provide this, namely animelon.com and daiweeb.org
I would recommend trying to switch to pure Japanese subtitles sooner rather than later. I feel like your eyes just cheat and jump to English if its there. Also, you want to try and and eventually go from words -> meaning, not words -> english translation -> meaning.
I would also recommend rewatching shows you have already seen to make it easier at first.
Many people mine vocab words with context and make anki cards from shows/manga/LNs/games, which can be a good method to study vocab.