Thanks for your opinion!
I admit I'm still a bit puzzled about how to start learning the runes because it doesn't seem to be comparable to how I learned tarot. I'm curious whether/how that will change for me eventually...
They are nothing like tarot. Learning the runes, really knowing them, requires quite a bit. Each rune is it's own entity, it's own spirit. Unlike the cards which hold archetypes and patterns of thinking- each rune is it's own being. In order to learn them, you have to take everything you think about the rune and suspend it for a bit- then really work on gaining your own interpretation and relationship with each one. A book will only give you that author's interpretation of his/her own work. It is why I like Galina's book- gives you a chance and some ideas on how to form your own relationships.
A good place to start is reading the old poems- on how Odin was able to find the rune spirits, and each individual rune poem. Then, you can sit and study the image, sing the rune name, work in whatever manner it is that you use to meditate/journey/etc and then find the rune spirit to learn what it has to show you.
It is much less an academic exercise and more of a spiritual quest. Remember the sacrifice Odin had to make to learn them- that helps to realize how much you have to give in order to understand their mysteries. Which is why runes aren't for everyone- they simply demand so much. Even more than the Ogham, in my experience. Which is why, if you chose to use them for divination, they typically work on a much deeper level than tarot. I use mine for divination very infrequently- and mostly to help with healing work or when there are very important spiritual or family matters that require understanding the web of choices and consequences that are available.
That probably wasn't very helpful.... but I do feel it is important to know. Runes definitely require a different mindset than the cards. Good luck in your workings- in the end, the time and sacrifice is worth it.