Starting with fruit/veggie fingers is definitely ideal. It's safe for the age, and squishy fun for baby to get the hang of picking up. Avacado and banana are the only ones you don't have to cook, otherwise you should steam or bake it. You can freeze baby food, too, although it's better to use things you're willing to eat so that way your baby can see you eating to get the idea. This site has some good info about what foods are good to start baby on.
Don't expect immediate results. Babies have to learn a lot of skills to be able to do BLW. First they have to learn to recognize it as food, how to get as much in their mouth as they want at a time, to bite off as much as they want, to chew, to move it back into their mouth, and to swallow. It's pretty common for babies to start eating more slowly on BLW than TW because of all the skills they have to learn- but once they get the hang of BLW, they can do way better on self-feeding and also textures much earlier than TW babies.
If, for some reason, you feel that a mix of BLW and TW is best- you can do a combo.
Just give LO whatever you're eating... BLW is really about family meals from the word go rather than doing things specially. At first you might want to cut some things into shapes that are easier to pick up e.g. sticks but don't go crazy over it. Don't give LO honey or whole nuts, uncooked eggs etc and watch out for salt content... that's it really!
People who do BLW still need to be just as concerned about dietary concerns of babies as TW folk. It's best to start with safe foods for the age range (there's a chart here) and also to introduce one food at a time. Eggs are generally advised to be avoided until 8 months or so, especially if there's a history of allergies. Pediatricians advise starting nuts anywhere from after 1 year to after 3.
It doesn't matter for all babies- the guidelines are just rules of thumb based on what most babies can be expected to handle at a certain age. Some babies can handle more, others less. But especially with sensitive babies- following the rules is VERY important. It lets you know exactly what the problem is if they have an allergic reaction/intolerance/sensitivity, it avoids stomach problems, etc.
BLW does not make it any easier to tell if a baby who had a bad reaction to shepherd's pie is intolerant of some of the spices, the mince, or the potato.