I am a BLW fan. My DS completely refused the spoon, despite clearly being hungry, but the second I gave him a bit of broccoli he was off! It has been a complete delight to watch him feed himself and enjoy food so much. He eats tonnes of vegetables and is starting to really love meat etc etc. I do sometimes use purees when he's really tired or teething or we're out and about and it's all a bit much! BUT you will need to be ready for a few things...
1) Smiling when she is gagging (not choking) which is a natural reflex while they learn to swallow
2) It seeming like they're not eating! which leads onto...
3) The mess!!! It goes on the floor, up their sleeves, everywhere. If you want to clean wean, take the puree route.
4) Loooooooooong mealtimes. It can take ages at first. And for a while it feels like you're always feeding- milk and solids alternated can fill a day, don't you know!
But having said all that, it's an amazing thing to teach your child to eat, however you choose to do it. Good luck.
Get a highchair in which she can sit up really straight and is easy to clean - ones with bells, whistles, recliners, cushions etc are much harder to get the weetabix off than simple ones. If you have the budget the Stokke Tripp Trapp is very nice indeed - if you don't the Ikea Antilop is well-designed, sturdy, can be hosed down after dinner and is about £12.
Protect the floor and the table so you are not running around getting stressed about mess while she's eating.
Don't worry if she doesn't seem interested in food for ages and ages - just keep offering in a low-key way.
Don't feel you have to buy books to tell you how to do it - get them from the lib if you must, or come on MN. And don't spend lots of time cooking special little things just for her or pushing things through sieves or you will get frustrated when she spits it out / chuck it on the floor / wipes it in her hair. Leftovers from your & dh's meals are sooo the way to go.
I like to think of BLW as LEARNING - learning about food, learning how to eat, rather than just passively eating. It's slow because of this, it takes time to master a new skill. You've been given some great advice here, but definitely do it - it's such fun and it will amaze you what your LO can do left to their own devices!
I don't think I'll rule through yoghurt later but I can't imagine DS needs it, IYSWIM, he can just have fruit and cheese in a bit. You could always load up a spoon with yoghurt, and see whether it ends up in the mouth?