My baby is close to 7 months and I started early (at 5). At the beginning, he had nothing but homemade cooked mashed carrots, or pumpkins or apple or pears once a day very few spoons (he did not know how to swallow). For a couple of weeks it was just that, no salt, sugar nor oils. Milk was still his main meal.
Closer to 06 months I started to mix those bases (carrots + pumpkins and apple+pear) for about a week. Later, I added one other veggie to the carrot or the pumpkin and one cooked fruit (mango) to the apple or pear. two weeks ago I started to add chicken breasts (which he's not a fan of) to the soups and am planning on starting this weekend to prepare stews (still mashed).
My lil' one currently eats two meals a day, still no salt but with a dash of olive or coconut oil and take milks only at night. Weirdly, he loves to take the mash fruit with the soups, but that's his preferences. For the things he's not fond of, I simply decrease the amount on his next meal so that the flavour is not too intense, and gradually increase if necessary.
Try mashing carrots or pumpkins which most babies enjoy quite liquid at the beginning.
Best of luck