I would recommend a book that explains grammar first and foremost. Vocabulary is key for developing your language skills but it comes later, you have to lay the ground work first. Try something like this book on grammar. I had a look through it and it looks like it's quite good at explaining and is what I would have given myself if I could go back in time to my beginner self.
I started with a textbook called Rivstart, but I wouldn't recommend it for a complete beginner for two reasons: firstly it's all in Swedish so without a teacher, it's quite hard to get into, and secondly, it doesn't explain how the language works. Things like word order and endings are really important in Swedish, in a way that they're not in English, so I would really recommend a grammar book, like the one I linked above.
I'd also recommend this youtube channel. The host speaks very slow and clear Swedish so you can hear each word and hear the tonalities of the language, which you can't get from a textbook. The videos also have Swedish and English subtitles so you can follow along.
Good luck with your language journey! Swedish is a beautiful language and I've loved learning it! Lucka till!