kitsun.io is the way to go. It’s a product being built by a WK user, so a lot of the features are similar to WK’s user-experience, if not better.
Something to take into consideration is that even though Kitsun is free for now, it will go pay to use in the following months.
Kitsun’s thread on the forums (you can see some screenshots here): Kitsun.io - Web & Apps SRS Study Platform
In terms of method of learning words, I only advise two things:
- Do one of the mainstream decks (Katakana 4500 words, Core 10k or the Genki vocabulary deck - log in to access the links)
- From words you see through exposure, only learn them after exposing yourself to them. Not before. For example, if you’re reading a book, you should go along with reading it and add the words to your SRS as you go. Pre studying vocab is less attractive and less efficient. With Kitsun, you can easily do the former, as Jisho is integrated on the website. You can make flashcards in seconds, as you can see from my screenshot:
As an example, this is how the Genki deck looks like (made by our lovely @hinekidori):
